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.

A381780 G.f. A(x) satisfies A(x) = (1 + x*A(x)^2) * C(x*A(x)^3), where C(x) is the g.f. of A000108.

Table of values

n a(n)
0 1
1 2
2 13
3 122
4 1348
5 16317
6 209366
7 2797461
8 38509302
9 542367569
10 7778173646
11 113196865436
12 1667497600735
13 24816081138489
14 372551391235504
15 5635157636123317
16 85797446797707896
17 1313857342649814042
18 20222887980813290849
19 312694810135597988049
20 4854881337618505385339

List of values

[1, 2, 13, 122, 1348, 16317, 209366, 2797461, 38509302, 542367569, 7778173646, 113196865436, 1667497600735, 24816081138489, 372551391235504, 5635157636123317, 85797446797707896, 1313857342649814042, 20222887980813290849, 312694810135597988049, 4854881337618505385339]