A374292 - cp's OEIS frontend

A374292 Number of permutations of [n] such that the number of cycles of length k is zero or a divisor of k for every k.

n	a(n)
0	1
1	1
2	1
3	5
4	17
5	89
6	474
7	3324
8	28440
9	253448
10	2476700
11	26876420
12	328110540
13	4207321260
14	58468831680
15	877439227560
16	14214209548560
17	239870470655760
18	4285924637475600
19	81381169697904720
20	1636049164466934000
21	34301061146870607600
22	750389221227585139200

[1, 1, 1, 5, 17, 89, 474, 3324, 28440, 253448, 2476700, 26876420, 328110540, 4207321260, 58468831680, 877439227560, 14214209548560, 239870470655760, 4285924637475600, 81381169697904720, 1636049164466934000, 34301061146870607600, 750389221227585139200]

cp's OEIS Frontend

A374292 Number of permutations of [n] such that the number of cycles of length k is zero or a divisor of k for every k.

Table of values

List of values