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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.

A385473 Expansion of e.g.f. 1/(1 - arctanh(3*x))^(1/3).

Table of values

n a(n)
0 1
1 1
2 4
3 46
4 568
5 10624
6 218656
7 5702752
8 163568128
9 5497133824
10 201702168064
11 8319367856128
12 371416377318400
13 18185429803469824
14 955872746109276160
15 54228988018125125632
16 3278679608280623841280
17 211600457615794941460480
18 14461966051190623712051200

List of values

[1, 1, 4, 46, 568, 10624, 218656, 5702752, 163568128, 5497133824, 201702168064, 8319367856128, 371416377318400, 18185429803469824, 955872746109276160, 54228988018125125632, 3278679608280623841280, 211600457615794941460480, 14461966051190623712051200]

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

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