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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.

A245502 Number of endofunctions f on [n] such that f^6(i) = f(i) for all i in [n].

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 41
5 220
6 1921
7 25474
8 384113
9 5785192
10 85295105
11 1244587246
12 18399553801
13 286188407116
14 4920039471089
15 96938148715090
16 2172951409994081
17 53076309208887760
18 1351935357372173953
19 35000099470802409814
20 914038174404012874745
21 24209598764577808155316

List of values

[1, 1, 3, 10, 41, 220, 1921, 25474, 384113, 5785192, 85295105, 1244587246, 18399553801, 286188407116, 4920039471089, 96938148715090, 2172951409994081, 53076309208887760, 1351935357372173953, 35000099470802409814, 914038174404012874745, 24209598764577808155316]

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

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