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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A026869 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026747.

Original entry on oeis.org

1, 1, 4, 5, 17, 23, 74, 104, 326, 468, 1447, 2104, 6459, 9466, 28968, 42658, 130473, 192656, 589993, 872290, 2678007, 3960318, 12199689, 18032179, 55769978, 82346931, 255807384, 377172666, 1177155945, 1732702830
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027222 a(n) = greatest number in row n of array T given by A026747.

Original entry on oeis.org

1, 1, 3, 4, 11, 17, 44, 74, 184, 327, 790, 1461, 3452, 6584, 15278, 29879, 68290, 136391, 318035, 625731, 1487661, 2883357, 6971222, 13338421, 32727472, 61920497, 153926409, 288368511, 725264305, 1351124510, 3423262180
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027223 a(n) = self-convolution of row n of array T given by A026747.

Original entry on oeis.org

1, 2, 11, 34, 183, 630, 3384, 12192, 65536, 242232, 1303758, 4900880, 26415708, 100525392, 542639986, 2084879028, 11271483340, 43645729836, 236329734438, 921177944356
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027224 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026747.

Original entry on oeis.org

1, 6, 24, 132, 500, 2728, 10324, 56651, 215323, 1191987, 4549786, 25420734, 97369588, 548884043, 2108335364, 11983465575, 46136052623, 264215445322, 1019173758683, 5876647410170, 22705355331214, 131727633042981, 509673506069905, 2973264727753047, 11518483809430525
Offset: 1

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027225 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026747.

Original entry on oeis.org

1, 8, 52, 247, 1416, 6056, 33731, 139016, 770116, 3121259, 17335095, 69642995, 388958218, 1554558921, 8740670953, 34818606079, 197136480944, 783522002716, 4466326137854, 17722654061673, 101674164224552, 402960855102206, 2325563749837462, 9208279020729297, 53433859702165884
Offset: 2

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027226 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026747.

Original entry on oeis.org

1, 11, 75, 496, 2523, 14903, 68478, 389040, 1705001, 9552071, 40792260, 227758442, 957346363, 5353798598, 22267534284, 125033595506, 516148089100, 2913354375795, 11958933491775, 67884893610121, 277431526202759, 1583886793301326, 6449958580342975, 37029044240499120
Offset: 3

Views

Author

Clark Kimberling

Keywords

Extensions

More terms from Sean A. Irvine, Oct 24 2019

A027227 a(n) = Sum_{k=0..n} (k+1) * A026747(n, k).

Original entry on oeis.org

1, 3, 10, 25, 71, 166, 444, 1002, 2601, 5742, 14653, 31864, 80472, 173077, 434243, 926144, 2313939, 4902478, 12216163, 25743143, 64042535, 134356858, 333927795, 697932219, 1733779702, 3612110059, 8971527052, 18639230426
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027228 a(n) = Sum_{k=0..n} (k+1) * A026747(n, n-k).

Original entry on oeis.org

1, 3, 10, 25, 73, 170, 468, 1050, 2799, 6138, 16043, 34644, 89390, 190913, 488285, 1034228, 2628861, 5532322, 14000177, 29311171, 73936801, 154145390, 387911301, 805899231, 2024537328, 4193625311, 10521409964, 21738996250
Offset: 0

Views

Author

Clark Kimberling

Keywords

A027229 a(n) = sum of squares of numbers in row n of array T given by A026747.

Original entry on oeis.org

1, 2, 11, 34, 184, 632, 3452, 12360, 68290, 249882, 1395696, 5175366, 29193025, 109227518, 621609060, 2340986206, 13428450520, 50823832190, 293606387095, 1115643664834, 6485734373020, 24724763566380, 144544075759391, 552543417604744, 3246390604086969, 12439310663680032
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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