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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.

A386764 a(n) = Sum_{k=0..n} 5^k * 3^(n-k) * binomial(2*n+k-1,k).

Table of values

n a(n)
0 1
1 13
2 319
3 8872
4 260511
5 7885793
6 243404884
7 7615561092
8 240662849871
9 7663737420223
10 245529092332599
11 7904950462600512
12 255541233005365956
13 8289112264436610828
14 269663237466343607464
15 8794852773491081069132
16 287467221911677590185391
17 9414259968096351504747483

List of values

[1, 13, 319, 8872, 260511, 7885793, 243404884, 7615561092, 240662849871, 7663737420223, 245529092332599, 7904950462600512, 255541233005365956, 8289112264436610828, 269663237466343607464, 8794852773491081069132, 287467221911677590185391, 9414259968096351504747483]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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