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Index to OEIS: Section Ch

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Chacon sequences: A049320*, A049321*
Chains:: A007047, A005603, A005602
challenge problems, see sequences that need extending
Champernowne , sequences related to :

Champernowne constant: A033307*, A030167*, A058068, A058069, A007376, A033308

Champernowne sequence: A030190*, A030302

change, making: see making change
change ringing: see bell ringing
character tables: see also degrees of irreducible representations
characteristic functions , sequences related to :

characteristic functions (000): char fn where where name of "chi_n=1"

characteristic functions (001): chi chi_n=1 chi_n=0

characteristic functions (002): A000007 A000004 A000027 all 0

characteristic functions (003): A000012 A001477 [empty] natural numbers

characteristic functions (004): A000035 A005408 A005843 odd numbers

characteristic functions (005): A003849 A003622 A022342

characteristic functions (006): A004641 A086377 A081477

characteristic functions (007): A005171 A018252 A000040 nonprimes

characteristic functions (008): A005369 A002378 A078358 pronic numbers

characteristic functions (009): A005614 A022342 A003622

characteristic functions (010): A008966 A005117 A013929 squarefree

characteristic functions (011): A010051 A000040 A018252 primes

characteristic functions (012): A010052 A000290 A000037 squares

characteristic functions (013): A010054 A000217 A014132 triangular numbers

characteristic functions (014): A010055 A000961 A024619 prime powers

characteristic functions (015): A010056 A000045 A001690 Fibonacci numbers

characteristic functions (016): A010057 A000578 A007412 cubes

characteristic functions (017): A010058 A000108 A092459 Catalan numbers

characteristic functions (018): A010059 A001969 A000069 evil numbers

characteristic functions (019): A010060 A000069 A001969 odious numbers

characteristic functions (020): A011655 A001651 A008585 not mult 3

characteristic functions (021): A012245 A000142 A063992 factorials

characteristic functions (022): A014306 A145397 A000292 m(m+1)(m+2)6

characteristic functions (023): A014578 A007417 A145204

characteristic functions (024): A020987 A022155 NA

characteristic functions (025): A023531 A000096 A007401 m(m+3)2

characteristic functions (026): A023533 A000292 A145397 m(m+1)(m+2)6

characteristic functions (027): A033683 A104777 NA odd squares mod 3 > 0

characteristic functions (028): A033684 A135556 NA squares mod 3 > 0

characteristic functions (029): A035263 A003159 A036554

characteristic functions (030): A036987 A000225 NA

characteristic functions (031): A038189 A091067 A091072

characteristic functions (033): A057427 A000027 A000004 positive numbers

characteristic functions (034): A059448 A059009 A059010

characteristic functions (035): A059841 A005843 A005408 even numbers

characteristic functions (036): A063524 A000012 A087156 all 1

characteristic functions (037): A064911 A001358 A100959 semiprimes

characteristic functions (038): A065043 A028260 A026424 even number of prime factors

characteristic functions (039): A065202 A065201 A065200

characteristic functions (040): A065333 A003586 A059485 3-smooth

characteristic functions (041): A066247 A002808 A008578 composite numbers

characteristic functions (042): A066829 A026424 A028260 odd number of prime factors

characteristic functions (043): A072401 A004215 NA of the form 4^m*(8k+7)

characteristic functions (044): A075802 A001597 A007916 perfect powers

characteristic functions (045): A075897 A048645 NA

characteristic functions (046): A079260 A002144 A137409 primes of form 4n+1

characteristic functions (047): A079261 A002145 A145395 primes of form 4n+3

characteristic functions (048): A079978 A008585 A001651 mult 3

characteristic functions (049): A079979 A008588 A047253 mult 6

characteristic functions (050): A079998 A008587 A047201 mult 5

characteristic functions (051): A080110 A080112 A080113

characteristic functions (052): A080111 A080113 A080112

characteristic functions (053): A080116 A014486 NA

characteristic functions (054): A080339 A008578 A002808 {1} union {primes}

characteristic functions (055): A080545 A006005 A065090 {1} union {odd primes}

characteristic functions (056): A080995 A001318 A118300 gen. pentagonal numbers

characteristic functions (057): A082784 A008589 A047304 mult 7

characteristic functions (058): A083187 A002379 NA [ 3^n 2^n ]

characteristic functions (059): A083923 A057548 NA

characteristic functions (060): A083924 A072795 NA

characteristic functions (061): A085357 A003714 A004780 Fibbinary numbers

characteristic functions (062): A086299 A002473 A068191 7-smooth

characteristic functions (063): A088517 A001463 NA

characteristic functions (064): A089011 A005763 NA Weyl

characteristic functions (065): A091225 A014580 NA

characteristic functions (066): A091247 A091242 NA

characteristic functions (067): A092248 A030230 A030231 even number of distinct prime factors

characteristic functions (068): A093709 A028982 A028983 squares or twice squares

characteristic functions (069): A093719 A047273 A047235 (mod 2)^(mod 3)

characteristic functions (070): A095076 A020899 A095096

characteristic functions (071): A095111 A095096 A020899

characteristic functions (072): A098108 A016754 NA

characteristic functions (073): A099104 A066680 NA badly sieved numbers

characteristic functions (074): A099395 A007283 NA

characteristic functions (075): A101040 NA NA not more than 2 prime factors

characteristic functions (076): A101605 A014612 NA exactly 3 prime factors

characteristic functions (077): A101637 A014613 NA exactly 4 prime factors

characteristic functions (078): A102460 A000032 NA Lucas numbers

characteristic functions (079): A103673 A103676 A103677 (factorial)

characteristic functions (080): A103674 A103678 A103679 (factorial)

characteristic functions (081): A103675 A103680 A103681 (factorial)

characteristic functions (082): A105349 A000129 NA Pell numbers

characteristic functions (083): A107078 A013929 A005117 non unitary divisors

characteristic functions (084): A112526 A001694 A052485 powerful numbers

characteristic functions (085): A114986 A000201 A001950

characteristic functions (086): A118952 A118957 A118956

characteristic functions (087): A121262 A008586 A042968 mult 4

characteristic functions (088): A122255 A122254 A048136

characteristic functions (089): A122257 A005109 A122259 Pierpont primes

characteristic functions (090): A122261 A122260 NA mult. closure of Pierpont primes

characteristic functions (091): A122895 A123240 NA tau=Fibonacci

characteristic functions (092): A123927 A119885 NA tau=Lucas

characteristic functions (093): A130638 A005237 NA tau(n+1)=tau(n)

characteristic functions (094): A132138 A002977 A132142

characteristic functions (095): A133010 NA NA

characteristic functions (096): A133011 NA NA

characteristic functions (097): A133100 A085787 NA gen. heptagonal numbers

characteristic functions (098): A133101 A057569 NA

characteristic functions (099): A133872 A042948 A042964 congruent 0 or 1 mod 4

characteristic functions (100): A136522 A002113 A029742 palindrome

characteristic functions (101): A137794 A073491 A073492 no prime gaps in fact

characteristic functions (102): A139689 NA NA Chen

characteristic functions (103): A141260 A141259 NA

characteristic functions (104): A143731 A024619 A000961 more than 1 prime factor

characteristic functions (105): A145649 A000959 A050505 lucky numbers

characteristic functions (106): A156660 A005384 A138887 Sophie Germain primes

characteristic functions (107): A156659 A005385 A156657 safe primes

characteristic functions (108): A079559 A005187 A055938 range of A005187

characteristic functions (109): A151774 A018900 A161989 numbers with binary weight 2

characteristic functions (110): A167392 A000041 A167376 partition numbers

characteristic functions (111): A167393 A000009 A167377 range of A000009

characteristic functions (112): A168046 A052382 A011540 zerofree numbers

characteristic functions (113): A166486 A042968 A008586 not a multiple of 4

characteristic functions (114): A011558 A047201 A008587 coprime to 5

characteristic functions (115): A097325 A047253 A008588 not a multiple of 6

characteristic functions (116): A109720 A047304 A008589 coprime to 7

characteristic functions (117): A168181 A047592 A008590 not a multiple of 8

characteristic functions (118): A168182 A168183 A008591 not a multiple of 9

characteristic functions (119): A168184 A067251 A008592 not a multiple of 10

characteristic functions (120): A145568 A160542 A008593 coprime to 11

characteristic functions (121): A168185 A168186 A008594 not a multiple of 12

characteristic functions (122): A054521 A169581 A169581

characters of groups: A005368
characters, see also under symmetric group
Chebycheff is spelled Chebyshev throughout
Chebychev is spelled Chebyshev throughout
Chebyshev function theta(n): A035158, A057872, A083535
Chebyshev polynomials , sequences related to :

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 1): A001792 A001793 A001794 A002698 A005583 A005584 A006974 A006975 A006976 A007701 A008310 A008311

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 2): A020537 A020538 A020539 A039991 A053120 A001105 A002415 A002492 A005585 A040977 A050486 A008314

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 3): A053347 A054322 A054323 A054324 A054325 A054326 A054327 A054328 A054329 A054330 A054331 A054332

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 4): A054333 A054334 A001653 A070997 A001091 A072256 A001075 A001541 A005248 A003501 A056854 A056918

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 5): A057076 A001079 A023038 A011943 A023039 A001081 A001085 A077235 A077236 A077237 A077238 A077239

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 6): A077240 A077242 A077244 A077246 A077248 A077250 A077409 A077411 A001570 A001835 A056771 A077417

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 7): A077420 A077422 A077424 A077428 A078356 A078363 A078365 A078367 A078369 A000129 A001333 A001076

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 8): A001077 A005667 A005668 A041025 A078986

Chebyshev polynomials of the first kind (T- or C- polynomials) ( 9): A090733 A090248 A090251 A001519 A097308-A097316 A097725-A097742 A097765-A097784 A097826-A097835

Chebyshev polynomials of the first kind (T- or C- polynomials) (10): A090729 A090731 A097837 A097838 A097840-A097845 A098244 A098246 A098247

Chebyshev polynomials of the first kind (T- or C- polynomials) (11): A098249 A098250 A098252 A098253 A098255 A098256 A098258 A098259 A098261 A098262 A098291 A098292 A078070 A004146 A007877 A054493 A011655 A011655 A049683

Chebyshev polynomials of the first kind (T- or C- polynomials) (12): A098249 A049684 A095004 A098296-A098299 A098300-A098310 A005386 A092936 A099270-A099273 A099275-A099279 A099365-A099374 A099368 A099397 A001108 A007598 A079291

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 1): A001787 A001788 A001789 A002605 A003472 A008312 A008313 A008315 A010892 A020540 A020541 A020542

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 2): A030195 A030191 A030221 A030192 A030240 A049310 A049347 A053117 A053118 A053119 A053121 A002700

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 3): A053122 A051323 A053124 A053125 A053126 A053127 A053128 A053129 A053130 A053131 A001653 A001109

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 4): A054450 A001090 A001353 A018913 A004187 A004254 A004189 A001834 A002878 A002315 A056594

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 5): A057076 A057077 A057078 A057079 A057080 A057081 A001906 A056854 A056918

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 6): A057083 A057084 A057085 A057086 A057087 A057088 A057089 A057090 A057091 A057092 A057093 A057094

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 7): A025170 A025171 A004190 A001653 A070997 A001091 A072256 A054320 A004189 A001075 A005248 A003501

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 8): A054491 A054488 A023038 A004191 A007655 A011943 A049660 A023039 A001081 A001085 A075843 A077234

Chebyshev polynomials of the second kind (U- or S- polynomials) ( 9): A077237 A077413 A077241 A077243 A077245 A077247 A077249 A077251 A077410 A077412

Chebyshev polynomials of the second kind (U- or S- polynomials) (10): A028230 A001835 A029547 A046176 A029548 A077416 A077418 A077420 A077421 A077422 A077423

Chebyshev polynomials of the second kind (U- or S- polynomials) (11): A077424 A077428 A078356 A078362 A078363 A078364 A078365 A078366 A078367 A078368 A078369

Chebyshev polynomials of the second kind (U- or S- polynomials) (12): A000129 A001333 A001076 A001077 A005667 A005668 A041025 A078986 A078987

Chebyshev polynomials of the second kind (U- or S- polynomials) (13): A092499 A090733 A090248 A090251 A001519 A078922 A092521 A092420 A076765 A076139 A049664

Chebyshev polynomials of the second kind (U- or S- polynomials) (14): A097726 A097727 A097729 A097730 A097732 A097733 A097735 A097736 A097738 A097739 A097741 A097742 A097766 A097767 A097769 A097770

Chebyshev polynomials of the second kind (U- or S- polynomials) (15): A090729 A090731 A097834-A097845 A098244-A098263 A098291 A098292 A078070 A004146 A007877 A099368 A041041 A052918 A054413 A054493 A098301

Chebyshev polynomials: see also A002680

checkers, sequences related to :

checkers: A055213, A133046, A133047

Chernoff sequence: A006939*, A051357
chess, number of games , sequences related to :

chess, number of games , definition: position = position with castling and en passant information, diagram = position without castling and en passant information

chess, number of games: A048987* A079485 A006494 A089956

chess, number of games: see also A007747 A007545 A007577

chess, number of diagrams: A019319* A090051

chess, number of positions: A083276* A057745 A089957

chessboard, halving a: A003155
chessboard, quartering a: A006067, A003213
Chinese: see also Index entries for sequences related to number of letters in n
chord diagrams, sequences related to :

chord diagrams: (1) A007293 A007473 A007474 A007769 A014595 A018191 A018192 A018193 A018225 A022489 A022490 A022491 A022492

chord diagrams: (2) A022493 A022494 A054499 A054938

chords in a circle: A001006, A054726, A006533, A000124
chords in a circle: see also Poonen-Rubinstein paper
Chowla sequence: see Mian-Chowla sequences
Chowla's function: sum of divisors excluding 1 and n: A048050*, A002954
chromatic number of graphs: A006670, A006671
chromatic number of surface: A000703*, A000934*, A059103
Chvatal conjecture, sequences related to :

Chvatal conjecture: A007008

circle of differences problem: A065677, A065678, A045794
circle problem: A057655*
circle product: A101330
circles, number of ways of arranging: A000081
circuits: A002631, A002632

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