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.

A239772 Number of pairs of functions f, g from a size n set into itself satisfying f(f(x)) = f(g(f(x))).

Table of values

n a(n)
0 1
1 1
2 10
3 231
4 9688
5 603445
6 52284816
7 5951141035
8 856275088768
9 151330313546361
10 32121886627244800
11 8043522214887251191
12 2341436450503523834880
13 782684599861773582454741
14 297337340445195054893615104
15 127232791559907423447708979875
16 60852096942278280426353043275776
17 32309821732254010064727052008198385

List of values

[1, 1, 10, 231, 9688, 603445, 52284816, 5951141035, 856275088768, 151330313546361, 32121886627244800, 8043522214887251191, 2341436450503523834880, 782684599861773582454741, 297337340445195054893615104, 127232791559907423447708979875, 60852096942278280426353043275776, 32309821732254010064727052008198385]

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

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