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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.

A246618 Number of endofunctions on [2n] whose cycle lengths are multiples of n.

Table of values

n a(n)
0 1
1 4
2 57
3 4480
4 866460
5 302835456
6 165589522560
7 130247609057280
8 139297568464454400
9 194428045753727385600
10 343266731083210449715200
11 747889980460943180326502400
12 1971026081420013638259189350400
13 6180432779330984921337015828480000

List of values

[1, 4, 57, 4480, 866460, 302835456, 165589522560, 130247609057280, 139297568464454400, 194428045753727385600, 343266731083210449715200, 747889980460943180326502400, 1971026081420013638259189350400, 6180432779330984921337015828480000]

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

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