A372545 - cp's OEIS frontend

A372545 Number of permutations of [n] such that the number of cycles of length k is a multiple or a divisor of k for every k.

n	a(n)
0	1
1	1
2	2
3	6
4	24
5	120
6	665
7	4655
8	37660
9	345660
10	3373629
11	37109919
12	443171498
13	5761229474
14	79709485141
15	1199252731963
16	19237203662248
17	327101074802216
18	5848216651372953
19	111064609625430747
20	2222478622302320382
21	46709011248199791062
22	1022898268873467547769

[1, 1, 2, 6, 24, 120, 665, 4655, 37660, 345660, 3373629, 37109919, 443171498, 5761229474, 79709485141, 1199252731963, 19237203662248, 327101074802216, 5848216651372953, 111064609625430747, 2222478622302320382, 46709011248199791062, 1022898268873467547769]

cp's OEIS Frontend

A372545 Number of permutations of [n] such that the number of cycles of length k is a multiple or a divisor of k for every k.

Table of values

List of values