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.

A219231 G.f. satisfies: A(x) = exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(n*k)*A(x^n)^k) ).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 15
5 47
6 160
7 554
8 1987
9 7243
10 26873
11 100930
12 383412
13 1469673
14 5679033
15 22095308
16 86489211
17 340360513
18 1345814572
19 5344184197
20 21303295069
21 85216434084
22 341960332173
23 1376212103798
24 5553269024152
25 22463340663474
26 91071265881382
27 369996643180885
28 1506118767637576

List of values

[1, 1, 2, 5, 15, 47, 160, 554, 1987, 7243, 26873, 100930, 383412, 1469673, 5679033, 22095308, 86489211, 340360513, 1345814572, 5344184197, 21303295069, 85216434084, 341960332173, 1376212103798, 5553269024152, 22463340663474, 91071265881382, 369996643180885, 1506118767637576]