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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.

A381879 Expansion of (1/x) * Series_Reversion( x * (1-x)^2 / C(x) ), where C(x) is the g.f. of A000108.

Table of values

n a(n)
0 1
1 3
2 16
3 106
4 788
5 6292
6 52743
7 457946
8 4083328
9 37174786
10 344142192
11 3229827900
12 30661272627
13 293907951057
14 2840826401664
15 27657352868946
16 270968414904700
17 2669604470832568
18 26431802684789970
19 262864480970961882
20 2624640191306617088
21 26301183967687772360

List of values

[1, 3, 16, 106, 788, 6292, 52743, 457946, 4083328, 37174786, 344142192, 3229827900, 30661272627, 293907951057, 2840826401664, 27657352868946, 270968414904700, 2669604470832568, 26431802684789970, 262864480970961882, 2624640191306617088, 26301183967687772360]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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