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.

A239759 Number of pairs of functions (f,g) from a set of n elements into itself satisfying f(g(x)) = g(f(g(x))).

Table of values

n a(n)
0 1
1 1
2 8
3 147
4 5032
5 274765
6 21702096
7 2327543743
8 324317092352
9 56816985879801
10 12201268360672000
11 3147485927264980411
12 959356469360927222784
13 340785570064053310187173
14 139449094593887763170361344
15 65080820095941557895304404375

List of values

[1, 1, 8, 147, 5032, 274765, 21702096, 2327543743, 324317092352, 56816985879801, 12201268360672000, 3147485927264980411, 959356469360927222784, 340785570064053310187173, 139449094593887763170361344, 65080820095941557895304404375]

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

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