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.

A241015 Number of pairs of endofunctions f, g on [n] satisfying g(g(g(f(i)))) = f(i) for all i in [n].

Table of values

n a(n)
0 1
1 1
2 6
3 141
4 6184
5 387545
6 33404256
7 3891981205
8 592320594048
9 113184611671473
10 26327424526220800
11 7302855260707822541
12 2381136881374877847552
13 901709366369630531857417
14 392234247731566637785780224
15 194028806625479344354551301125

List of values

[1, 1, 6, 141, 6184, 387545, 33404256, 3891981205, 592320594048, 113184611671473, 26327424526220800, 7302855260707822541, 2381136881374877847552, 901709366369630531857417, 392234247731566637785780224, 194028806625479344354551301125]

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

Content is available under The OEIS End-User License Agreement.