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.

A381907 Expansion of (1/x) * Series_Reversion( x / ((1+x)^3 * B(x)) ), where B(x) is the g.f. of A001764.

Table of values

n a(n)
0 1
1 4
2 25
3 197
4 1783
5 17646
6 185622
7 2039617
8 23149542
9 269367631
10 3196544816
11 38539697456
12 470773651286
13 5813914938293
14 72470441063067
15 910587733474165
16 11521140613913305
17 146659482494039073
18 1876975898990490298
19 24137070792680577688
20 311724732112458291945

List of values

[1, 4, 25, 197, 1783, 17646, 185622, 2039617, 23149542, 269367631, 3196544816, 38539697456, 470773651286, 5813914938293, 72470441063067, 910587733474165, 11521140613913305, 146659482494039073, 1876975898990490298, 24137070792680577688, 311724732112458291945]