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.

A380228 Expansion of e.g.f. exp( exp( (exp(2*x)-1)/2 ) - 1 ).

Table of values

n a(n)
0 1
1 1
2 4
3 21
4 139
5 1108
6 10287
7 108699
8 1285228
9 16783395
10 239571125
11 3706900992
12 61746357449
13 1100827515921
14 20902202270580
15 420903243601485
16 8955301860908499
17 200664408693149164
18 4721693823656357303
19 116370390417335016731
20 2997078741899026174972
21 80492590654279893652283

List of values

[1, 1, 4, 21, 139, 1108, 10287, 108699, 1285228, 16783395, 239571125, 3706900992, 61746357449, 1100827515921, 20902202270580, 420903243601485, 8955301860908499, 200664408693149164, 4721693823656357303, 116370390417335016731, 2997078741899026174972, 80492590654279893652283]

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

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