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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.

A325956 Number of cyclic permutations of [n] with symmetry order s=1.

Table of values

n a(n)
1 1
2 0
3 0
4 4
5 20
6 108
7 714
8 4992
9 40284
10 362480
11 3628790
12 39912648
13 479001588
14 6226974684
15 87178287120
16 1307673722880
17 20922789887984
18 355687417715904
19 6402373705727982
20 121645100223034480
21 2432902008175589664
22 51090942167993548700
23 1124000727777607679978
24 25852016738803204991232

List of values

[1, 0, 0, 4, 20, 108, 714, 4992, 40284, 362480, 3628790, 39912648, 479001588, 6226974684, 87178287120, 1307673722880, 20922789887984, 355687417715904, 6402373705727982, 121645100223034480, 2432902008175589664, 51090942167993548700, 1124000727777607679978, 25852016738803204991232]

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

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