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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.

A370324 Number of derangements of [n] having no adjacent 2-cycles, no adjacent 3-cycles, no adjacent 4-cycles and no adjacent 5-cycles.

Table of values

n a(n)
0 1
1 0
2 0
3 1
4 6
5 34
6 217
7 1567
8 12842
9 117704
10 1193802
11 13280778
12 160843345
13 2107036346
14 29689965966
15 447822830067
16 7199604972876
17 122907451783308
18 2220526880775841
19 42328779624824103
20 849065324387063412
21 17877539166289948864
22 394246737752465047380

List of values

[1, 0, 0, 1, 6, 34, 217, 1567, 12842, 117704, 1193802, 13280778, 160843345, 2107036346, 29689965966, 447822830067, 7199604972876, 122907451783308, 2220526880775841, 42328779624824103, 849065324387063412, 17877539166289948864, 394246737752465047380]

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

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