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.

A215128 G.f.: Sum_{n>=0} d^n/dx^n (x + x^2)^(2*n) / n!.

Table of values

n a(n)
0 1
1 2
2 12
3 64
4 370
5 2184
6 13132
7 79944
8 491238
9 3040400
10 18926336
11 118369368
12 743199184
13 4681668488
14 29574616440
15 187281906512
16 1188494457492
17 7556371963488
18 48123031011036
19 306929964849200
20 1960230225450420
21 12534313062502440
22 80236414444623240

List of values

[1, 2, 12, 64, 370, 2184, 13132, 79944, 491238, 3040400, 18926336, 118369368, 743199184, 4681668488, 29574616440, 187281906512, 1188494457492, 7556371963488, 48123031011036, 306929964849200, 1960230225450420, 12534313062502440, 80236414444623240]