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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A026880 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026758.

Original entry on oeis.org

1, 1, 3, 4, 12, 17, 50, 73, 212, 315, 909, 1365, 3931, 5940, 17122, 25960, 75053, 113951, 330917, 502399, 1467067, 2224888, 6537922, 9896852, 29281109, 44218651, 131765882, 198432519, 595663485, 894311205, 2704572795
Offset: 1

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Author

Clark Kimberling

Keywords

A027230 Greatest number in row n of array T given by A026758.

Original entry on oeis.org

1, 1, 2, 4, 7, 16, 27, 66, 109, 279, 469, 1201, 2119, 5242, 9607, 23133, 43727, 103015, 199819, 462269, 916631, 2132121, 4220267, 10010203, 19497608, 47042042, 90370622, 221337726, 420136173, 1042837195, 1958787580
Offset: 0

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Author

Clark Kimberling

Keywords

A027231 Self-convolution of row n of array T given by A026758.

Original entry on oeis.org

1, 2, 6, 26, 91, 424, 1563, 7490, 28363, 138154, 532277, 2622108, 10229514, 50827494, 200236656, 1001864238, 3978724091, 20024629606, 80072228433, 405071776024, 1629554359654, 8281491341260, 33495987519034, 170937706521070, 694795683685757, 3559265886170942
Offset: 0

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Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027232 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026758.

Original entry on oeis.org

1, 4, 19, 72, 355, 1347, 6843, 26077, 135752, 519336, 2760110, 10591394, 57299551, 220393887, 1210772453, 4665698732, 25974365600, 100243916036, 564517479641, 2181476412875, 12407767954139, 48002072364351, 275392803316254, 1066512702720864, 6164746100658825, 23896975393255717
Offset: 1

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Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027233 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026758.

Original entry on oeis.org

1, 7, 34, 184, 785, 4107, 16894, 88397, 358212, 1892182, 7609892, 40695540, 162938176, 882569071, 3523144085, 19320028921, 76956041950, 426863069443, 1697410759579, 9513773568608, 37779519792187, 213739273560729, 847809431322520, 4836704323382544, 19167125562029304
Offset: 2

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Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027234 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026758.

Original entry on oeis.org

1, 9, 62, 320, 1837, 8376, 45666, 198471, 1065418, 4523403, 24247545, 101589616, 547233490, 2273356598, 12341618508, 50963502172, 279167141052, 1147495086055, 6344204700832, 25979651242434, 144938080884808, 591635283209270, 3328970814605391, 13551109648829458, 76853618775913752
Offset: 3

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Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027235 a(n) = Sum_{k=0..n} (k+1) * A026758(n, k).

Original entry on oeis.org

1, 3, 8, 22, 53, 138, 317, 803, 1794, 4478, 9823, 24321, 52662, 129815, 278365, 684689, 1457113, 3581074, 7574863, 18616678, 39182980, 96351078, 201947877, 497006898, 1038017513, 2557192089, 5324505911, 13131212951, 27268815916
Offset: 0

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Author

Clark Kimberling

Keywords

Crossrefs

Cf. A026758.

A027236 a(n) = Sum_{k=0..n} (k+1) * A026758(n, n-k).

Original entry on oeis.org

1, 3, 8, 23, 55, 149, 339, 889, 1966, 5059, 10985, 27939, 59898, 151210, 321155, 806806, 1701347, 4260511, 8933737, 22325426, 46600476, 116300505, 241846731, 603086027, 1250175771, 3116094702, 6442311137, 16054097455, 33114584924
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027237 Sum of squares of numbers in row n of array T given by A026758.

Original entry on oeis.org

1, 2, 6, 27, 92, 453, 1616, 8284, 30254, 159435, 590374, 3178992, 11878204, 65099245, 244797592, 1361584755, 5144714416, 28975155915, 109899043030, 625578384150, 2380191727582, 13672762887465, 52161061683208, 301987822527627, 1154761251687762, 6730778868555523
Offset: 0

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019
Previous Showing 21-29 of 29 results.

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