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.

A385081 Irregular triangle T(n,k) of refined derangement counts in the symmetric group S_(n+1), refined per cycle type.

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 20
6 24
7 15
8 90
9 40
10 120
11 210
12 504
13 420
14 720
15 105
16 1260
17 1120
18 3360
19 2688
20 1260
21 5040
22 2520
23 9072
24 15120
25 25920
26 2240
27 20160
28 18144
29 40320
30 945
31 18900
32 25200
33 75600
34 120960
35 56700
36 226800
37 50400
38 172800
39 151200
40 72576
41 362880

List of values

[1, 2, 3, 6, 20, 24, 15, 90, 40, 120, 210, 504, 420, 720, 105, 1260, 1120, 3360, 2688, 1260, 5040, 2520, 9072, 15120, 25920, 2240, 20160, 18144, 40320, 945, 18900, 25200, 75600, 120960, 56700, 226800, 50400, 172800, 151200, 72576, 362880]

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

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