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.

A235328 Number of ordered pairs of endofunctions (f,g) on a set of n elements satisfying f(x) = g(f(f(x))).

Table of values

n a(n)
0 1
1 1
2 6
3 69
4 1336
5 39145
6 1598256
7 85996561
8 5872177536
9 494848403793
10 50333180780800
11 6068500612311841
12 854434117410352128
13 138752719761249646585
14 25714777079368557164544
15 5389541081414619785888625
16 1267387594395443339970052096
17 332074775201035547446532113825

List of values

[1, 1, 6, 69, 1336, 39145, 1598256, 85996561, 5872177536, 494848403793, 50333180780800, 6068500612311841, 854434117410352128, 138752719761249646585, 25714777079368557164544, 5389541081414619785888625, 1267387594395443339970052096, 332074775201035547446532113825]

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

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