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.

A381938 G.f. A(x) satisfies A(x) = (1 + x)^2 * B(x*A(x)), where B(x) is the g.f. of A001764.

Table of values

n a(n)
0 1
1 3
2 9
3 52
4 380
5 3066
6 26304
7 235314
8 2170312
9 20487963
10 196988392
11 1922327792
12 18990571724
13 189548947601
14 1908604524752
15 19364096602370
16 197761735366804
17 2031444188437719
18 20974821788118024
19 217561484977675026
20 2265961977605950416
21 23688432825547509283

List of values

[1, 3, 9, 52, 380, 3066, 26304, 235314, 2170312, 20487963, 196988392, 1922327792, 18990571724, 189548947601, 1908604524752, 19364096602370, 197761735366804, 2031444188437719, 20974821788118024, 217561484977675026, 2265961977605950416, 23688432825547509283]