cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A026089 a(n) = T(2n,n), where T is the array defined in A026082.

Original entry on oeis.org

1, 2, 4, 16, 93, 518, 2932, 16709, 95849, 552749, 3201848, 18616751, 108592239, 635175153, 3724193120, 21881993115, 128810517855, 759515272026, 4485048436792, 26520334731436, 157006248094198
Offset: 0

Views

Author

Clark Kimberling

Keywords

Crossrefs

Bisection of A026094.

A026090 a(n) = T(3n,n), where T is the array defined in A026082.

Original entry on oeis.org

1, 3, 9, 68, 552, 4524, 37531, 314280, 2651418, 22503384, 191935926, 1643789136, 14126691568, 121764645876, 1052237509089, 9113317001712, 79084764081720, 687489330917088, 5985694255080435, 52187865620386860, 455587704842911596
Offset: 0

Views

Author

Clark Kimberling

Keywords

A026091 a(n) = T(4n,n), where T is the array defined in A026082.

Original entry on oeis.org

1, 1, 18, 183, 1927, 20655, 224498, 2465815, 27304863, 304313548, 3409370698, 38362211823, 433219457730, 4907408334066, 55737813431070, 634528087334283, 7238225267825429, 82716464152842756, 946771870186411896, 10852263461880981957
Offset: 0

Views

Author

Clark Kimberling

Keywords

A026092 a(n) = T(2n,n-1), where T is the array defined in A026082.

Original entry on oeis.org

1, 1, 9, 45, 248, 1377, 7756, 44096, 252570, 1455166, 8424011, 48960606, 285512823, 1669721225, 9788890230, 57511916805, 338536358979, 1996103321754, 11787262391390, 69699393574522
Offset: 1

Views

Author

Clark Kimberling

Keywords

A026093 T(2n,n+1), where T is the array defined in A026082.

Original entry on oeis.org

1, 3, 27, 156, 925, 5427, 31812, 186485, 1094211, 6428346, 37817163, 222778629, 1314116799, 7761414055, 45894511305, 271681161390, 1609919112321, 9549113626206, 56690129330346, 336829717243428
Offset: 1

Views

Author

Clark Kimberling

Keywords

A026095 a(n) = Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array defined in A026082.

Original entry on oeis.org

1, 3, 6, 9, 22, 55, 153, 431, 1235, 3555, 10278, 29793, 86562, 251983, 734776, 2145825, 6275148, 18373299, 53856156, 158025189, 464112300, 1364247183, 4013353935, 11815188003, 34807249137, 102606325139, 302646363728, 893175905781
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Equals A024998(n) + 3, n>1.

A026096 Sum{T(n,k)}, k = 0,1,...,n, where T is the array defined in A026082.

Original entry on oeis.org

2, 4, 8, 15, 42, 127, 376, 1122, 3344, 9980, 29796, 89007, 265986, 795147, 2377744, 7112065, 21277698, 63670773, 190560180, 570416805, 1707707142, 5113158165, 15311384784, 45854766744, 137339426436, 411379964442, 1232324471060
Offset: 0

Views

Author

Clark Kimberling

Keywords

Crossrefs

For n>2, first differences of A026080.

A027316 a(n) = Sum_{k=0..m-1} T(n,k) * T(n,k+1), where m=n for n=0,1,2,3; m=2n for n >= 4; and T is given by A026082.

Original entry on oeis.org

1, 4, 15, 70, 644, 5502, 46936, 402164, 3460536, 29885592, 258897792, 2248831350, 19579288052, 170814593158, 1492927792104, 13069310259850, 114576104658836, 1005775588360122, 8839355153926048, 77768991557179442, 684886480844420844, 6037008171432448154
Offset: 1

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 27 2019

A027317 a(n) = Sum_{k=0..m-2} T(n,k) * T(n,k+2), where m=n for n=0,1,2,3; m=2n for n >= 4; and T is given by A026082.

Original entry on oeis.org

1, 6, 71, 561, 4797, 41462, 359530, 3124752, 27213084, 237432807, 2075064759, 18162872365, 159198909233, 1397157808149, 12275908402205, 107974903916703, 950639462501475, 8377212510209165, 73882962176311701, 652114141845864819, 5759883148706408695
Offset: 2

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 27 2019

A027318 a(n) = Sum_{k=0..m-3} T(n,k) * T(n,k+2), where m=n for n=0,1,2,3; m=2n for n >= 4; and T is given by A026082.

Original entry on oeis.org

1, 42, 420, 3786, 33648, 297940, 2633872, 23265744, 205446960, 1814136746, 16021697220, 141535810130, 1250763720312, 11057433981126, 97794407702052, 865284559977150, 7659315417653664, 67827407480624862, 600898634852988364, 5325658497658529790
Offset: 3

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 27 2019
Previous Showing 11-20 of 20 results.

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