A364283 - cp's OEIS frontend

A364283 Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length different from its own as an element.

n	a(n)
0	1
1	0
2	0
3	1
4	2
5	12
6	60
7	408
8	2640
9	24480
10	208080
11	2262960
12	23950080
13	307359360
14	3835641600
15	57400358400
16	825160089600
17	13909727462400
18	229664981145600
19	4310966499840000
20	79428141112320000
21	1658163790483200000
22	33795850208440320000
23	770528520983789568000

[1, 0, 0, 1, 2, 12, 60, 408, 2640, 24480, 208080, 2262960, 23950080, 307359360, 3835641600, 57400358400, 825160089600, 13909727462400, 229664981145600, 4310966499840000, 79428141112320000, 1658163790483200000, 33795850208440320000, 770528520983789568000]

cp's OEIS Frontend

A364283 Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length different from its own as an element.

Table of values

List of values