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.

A370022 Expansion of g.f. A(x) satisfying Sum_{n=-oo..+oo} (-1)^n * (x^n + 2*A(x))^n = 1 + 4*Sum_{n>=1} (-1)^n * x^(n^2).

Table of values

n a(n)
1 1
2 2
3 7
4 25
5 85
6 301
7 1086
8 3927
9 14328
10 52724
11 194915
12 723845
13 2699878
14 10104968
15 37933855
16 142795810
17 538829973
18 2037596590
19 7720231359
20 29302685197
21 111398230285
22 424115408181
23 1616860117052
24 6171586558551
25 23583939930835
26 90218328876825
27 345461395176495
28 1324041033133129

List of values

[1, 2, 7, 25, 85, 301, 1086, 3927, 14328, 52724, 194915, 723845, 2699878, 10104968, 37933855, 142795810, 538829973, 2037596590, 7720231359, 29302685197, 111398230285, 424115408181, 1616860117052, 6171586558551, 23583939930835, 90218328876825, 345461395176495, 1324041033133129]