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.

A203254 G.f.: A(x) = exp( Sum_{n>=1} G_n(x^n)*x^n/n ) such that G_n(x^n) = Product_{k=0..n-1} A(u^k*x) where u is an n-th root of unity.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 10
5 22
6 62
7 146
8 422
9 1084
10 3160
11 8064
12 25190
13 65204
14 198652
15 545790
16 1680122
17 4495548
18 14352768
19 38665478
20 122530052
21 343978146
22 1072985932
23 2947659006
24 9662067644
25 26573691092
26 84395544446
27 241295995524
28 769819399580
29 2140972333774
30 7039688293036
31 19579468840840

List of values

[1, 1, 2, 4, 10, 22, 62, 146, 422, 1084, 3160, 8064, 25190, 65204, 198652, 545790, 1680122, 4495548, 14352768, 38665478, 122530052, 343978146, 1072985932, 2947659006, 9662067644, 26573691092, 84395544446, 241295995524, 769819399580, 2140972333774, 7039688293036, 19579468840840]