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.

A239750 Number of ordered pairs of endofunctions (f,g) on a set of n elements satisfying g(f(x)) = f(f(f(x))).

Table of values

n a(n)
0 1
1 1
2 6
3 87
4 2200
5 84245
6 4492656
7 315937195
8 28186856832
9 3099006365769
10 410478164588800
11 64323095036300111
12 11748771067445148672
13 2470422069374379054493
14 591735532838657160296448
15 160004357420756572368889875
16 48458574881000820765562863616

List of values

[1, 1, 6, 87, 2200, 84245, 4492656, 315937195, 28186856832, 3099006365769, 410478164588800, 64323095036300111, 11748771067445148672, 2470422069374379054493, 591735532838657160296448, 160004357420756572368889875, 48458574881000820765562863616]

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

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