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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"
Aurifeuillean factorizations, sequences related to : A207262, A211412
autobiographical numbers: A046043, A138480, A104784, but see also self-describing numbers
automata, see cellular automata
automatic sequences:

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