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Index to OEIS: Section Ar

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Index to OEIS: Section Ar


[ Aa | Ab | Al | Am | Ap | Ar | Ba | Be | Bi | Bl | Bo | Br | Ca | Ce | Ch | Cl | Coa | Coi | Com | Con | Cor | Cu | Cy | Da | De | Di | Do | Ea | Ed | El | Eu | Fa | Fe | Fi | Fo | Fu | Ga | Ge | Go | Gra | Gre | Ha | He | Ho | Ia | In | J | K | La | Lc | Li | Lo | Lu | M | Mag | Map | Mat | Me | Mo | Mu | N | Na | Ne | Ni | No | Nu | O | Pac | Par | Pas | Pea | Per | Ph | Poi | Pol | Pos | Pow | Pra | Pri | Pro | Ps | Qua | Que | Ra | Rea | Rel | Res | Ro | Ru | Sa | Se | Si | Sk | So | Sp | Sq | St | Su | Sw | Ta | Te | Th | To | Tra | Tri | Tu | U | V | Wa | We | Wi | X | Y | Z | 1 | 2 | 3 | 4 ]


arborescences: A003120
arccos(x) and other inverse trig functions, sequences related to :

arccos(x): see Pi/2-arcsin(x), A055786 / A002595
arccosec(x): see arcsin(1/x), A055786 / A002595
arccosech(x): see arcsinh(1/x), A055786 / A002595
arccosh(x): A052468/A052469
arccotangent reducible numbers: A002312
arcos and arccos are both used in the OEIS!
arcosh and arccosh are both used in the OEIS!
arcsec(x): see Pi/2-arcsin(1/x), A055786 / A002595
arcsech(x): see arccosh(1/x), A052468 / A052469
arcsin(x): A055786/A002595, A006228
arcsinh(x): A055786/A002595
arctangent numbers, triangle of: A008309*

areas: A005386
ARIBAS: A062916
arithmetic mean of 1st n terms is an integer ( 1): A000012 A000326 A001564 A001792 A004767 A005408 A005449 A005843 A016813 A019444 A049450 A057711
arithmetic mean of 1st n terms is an integer ( 2): A076540 A081038 A090942 A092930 A092929 A094588 A104249 A136391 A138879 A157142 A171769
arithmetic mean of 1st n terms is an integer ( 3): A000255 A002104 A099035 A094258
arithmetic means: A007340
arithmetic numbers: A003601*, A090944
arithmetic progressions of primes, see primes, in arithmetic progressions
arithmetic progressions with fixed prime signature, see primes, in arithmetic progressions
arithmetic progressions: A003407, A005115, A005836, A005837, A005838, A005839
arithmetic progressions, no three-term: see entry for non-averaging sets
Armstrong numbers, sequences related to :

Armstrong numbers: A005188*
Armstrong numbers: in other bases: A010343, A010344, A010345, A010346, A010347, A010348, A010349, A010350, A010351, A010352, A010353, A010354
Armstrong numbers: see also A014576

Aronson's sequence, sequences related to :

Aronson's sequence, generalized: A079000
Aronson's sequence, generalized: see also sequences of the a(a(n)) = 2n family
Aronson's sequence, numerical analogues of: ( 1) A000201 A003151 A003605 A004956 A005224 A007378 A010906 A014132 A026351 A045412 A061891 A064437
Aronson's sequence, numerical analogues of: ( 2) A073074 A079000* A079250 A079251 A079252 A079253 A079254 A079255 A079256 A079257 A079258 A079259
Aronson's sequence, numerical analogues of: ( 3) A079313 A079325 A079351 A079358 A079905 A079946 A079948 A080029 A080030 A080031 A080032 A080033
Aronson's sequence, numerical analogues of: ( 4) A080034 A080036 A080037 A080081 A080199 A080353 A080455 A080456 A080457 A080458 A080460 A080574
Aronson's sequence, numerical analogues of: ( 5) A080578 A080579 A080580 A080588 A080589 A080590 A080591 A080600 A080633 A080637 A080639 A080640
Aronson's sequence, numerical analogues of: ( 6) A080641 A080644 A080645 A080646 A080652 A080653 A080667 A080707 A080708 A080710 A080711 A080712
Aronson's sequence, numerical analogues of: ( 7) A080714 A080720 A080722 A080723 A080724 A080725 A080726 A080727 A080728 A080731 A080745 A080746
Aronson's sequence, numerical analogues of: ( 8) A080752 A080753 A080754 A080759 A080760 A080780 A080900 A080901 A080903 A080904 A080939 A080949
Aronson's sequence, numerical analogues of: ( 9) A081023 A081024 A081260 A081746 A091387 A091388 A091389 A091390 A091391
Aronson's sequence: A005224*, A080520 (French version)

arrays, sequences used for indexing, sequences related to :

arrays, indexing: A073189*
arrays, sequences used for indexing: (1) A000194 A002024 A002260 A002262 A003056 A003057 A003059 A004736 A025581 A048760 A053186 A055086
arrays, sequences used for indexing: (2) A055087 A071797 A073188 A073189*
arrays: A003169, A007073, A007074, A007072

artiads: A001583*
Artin's conjecture or constant, sequences related to :

Artin's conjecture : A001122
Artin's conjecture, Artin's constants: A005596* A048296* A065414 A065417 A066517
Artin's conjecture: see also primes by primitive root

ascent sequences: Total number of ascent sequences is given by A022493*. Number of ascent sequences avoiding 001 (and others) is A000079; avoiding 102 (and others) is A007051; 101 is A000108; 000 is A202058; 100 is A202059; 110 is A202060; 120 is A202061; 201 is A202062; 210 is A108304; 0123 is A080937; 0021 is A007317.
association schemes, sequences related to :

association schemes: A057495*, A057498 (noncommutative), A057499 (primitive)

asubb: see A121295, A121296, A121297, A121623 and other dungeon sequences, also A122618
asymmetric channel, codes for: A010101
asymmetric sequences: A002842
asymptotic expansions, sequences related to :

asymptotic expansions: A001163 A001164 A002073 A002074 A002304 A002305 A002514 A006572 A006953

atomic species: A005226, A005227, A007650
atomic weights: A007656*
audioactive decay: see "say what you see"
autobiographical numbers: A046043, A138480, A104784, but see also self-describing numbers
automata, see cellular automata
automatic sequences:

2-automatic: see related to binary expansion of n
3-automatic: see related to ternary expansion of n
10-automatic: see related to decimal expansion of n

automorphic numbers, sequences related to :

automorphic numbers: (1) A003226 A007185 A016090 A018247 A018248 A033819 A074194 A074250 A074321 A074330 A074332
automorphic numbers: (2) A030984 A030985 A030986 A030987 A030988 A030989 A030990 A030991 A030992 A030993 A030994
automorphic numbers: (3) A030995 A035383 A046883 A046884 A082576
automorphic numbers: see also A045537, A075154

avoiding arithmetic progressions: see entry for non-averaging sets
A_2 lattice: see A2 lattice
A_3 lattice: see f.c.c. lattice
A_4 lattice: see A4 lattice
a_b: see A121295, A121296, A121297, A121623, A122618
a_b: see also dungeons
A_n lattice: coordination sequence for: see A005901
A_n sequence, primes in: A111157


[ Aa | Ab | Al | Am | Ap | Ar | Ba | Be | Bi | Bl | Bo | Br | Ca | Ce | Ch | Cl | Coa | Coi | Com | Con | Cor | Cu | Cy | Da | De | Di | Do | Ea | Ed | El | Eu | Fa | Fe | Fi | Fo | Fu | Ga | Ge | Go | Gra | Gre | Ha | He | Ho | Ia | In | J | K | La | Lc | Li | Lo | Lu | M | Mag | Map | Mat | Me | Mo | Mu | N | Na | Ne | Ni | No | Nu | O | Pac | Par | Pas | Pea | Per | Ph | Poi | Pol | Pos | Pow | Pra | Pri | Pro | Ps | Qua | Que | Ra | Rea | Rel | Res | Ro | Ru | Sa | Se | Si | Sk | So | Sp | Sq | St | Su | Sw | Ta | Te | Th | To | Tra | Tri | Tu | U | V | Wa | We | Wi | X | Y | Z | 1 | 2 | 3 | 4 ]


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