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.

A228905 G.f.: exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n*k, k^2) * x^k ).

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 5
5 12
6 33
7 139
8 1251
9 10598
10 176642
11 4720781
12 106779821
13 5953841083
14 373265833332
15 23827795512789
16 3914313805097976
17 548326897932632059
18 108647952177920032693
19 45931050219457726501030
20 14741338951262398648743248
21 9489791738688118291360645939

List of values

[1, 1, 2, 3, 5, 12, 33, 139, 1251, 10598, 176642, 4720781, 106779821, 5953841083, 373265833332, 23827795512789, 3914313805097976, 548326897932632059, 108647952177920032693, 45931050219457726501030, 14741338951262398648743248, 9489791738688118291360645939]