A364281 - cp's OEIS frontend

A364281 Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length as an element.

n	a(n)
0	1
1	1
2	1
3	4
4	10
5	48
6	252
7	1584
8	10800
9	93600
10	823680
11	8588160
12	93381120
13	1158312960
14	14805504000
15	215028172800
16	3159494553600
17	51973589606400
18	873152856576000
19	16058241239040000
20	300754643245056000
21	6159522883497984000
22	127439374149255168000

[1, 1, 1, 4, 10, 48, 252, 1584, 10800, 93600, 823680, 8588160, 93381120, 1158312960, 14805504000, 215028172800, 3159494553600, 51973589606400, 873152856576000, 16058241239040000, 300754643245056000, 6159522883497984000, 127439374149255168000]

cp's OEIS Frontend

A364281 Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length as an element.

Table of values

List of values