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.

A301465 G.f.: Sum_{n>=0} ( (1+x)^n + (1+2*x)^n )^n * x^n.

Table of values

n a(n)
0 1
1 2
2 7
3 32
4 180
5 1142
6 8162
7 63807
8 541202
9 4926969
10 47799429
11 491254999
12 5322191407
13 60533874755
14 720300053902
15 8939841040157
16 115427887156492
17 1546880293065700
18 21472465304481214
19 308173758866549496
20 4565492159926897329
21 69713352146246150541
22 1095715822838490323551
23 17705238547423980566108
24 293792275476690070452598

List of values

[1, 2, 7, 32, 180, 1142, 8162, 63807, 541202, 4926969, 47799429, 491254999, 5322191407, 60533874755, 720300053902, 8939841040157, 115427887156492, 1546880293065700, 21472465304481214, 308173758866549496, 4565492159926897329, 69713352146246150541, 1095715822838490323551, 17705238547423980566108, 293792275476690070452598]