A364406 - cp's OEIS frontend

A364406 Number of permutations of [n] such that the minimal element of each cycle is also its length.

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	0
6	6
7	6
8	0
9	0
10	720
11	2160
12	9360
13	19440
14	30240
15	3659040
16	21772800
17	228614400
18	1632960000
19	11125900800
20	73025971200
21	1708337433600
22	15442053580800
23	254260755302400
24	3318429200486400
25	46929444097536000
26	546974781889536000
27	7312714579602432000

[1, 1, 0, 1, 0, 0, 6, 6, 0, 0, 720, 2160, 9360, 19440, 30240, 3659040, 21772800, 228614400, 1632960000, 11125900800, 73025971200, 1708337433600, 15442053580800, 254260755302400, 3318429200486400, 46929444097536000, 546974781889536000, 7312714579602432000]

cp's OEIS Frontend

A364406 Number of permutations of [n] such that the minimal element of each cycle is also its length.

Table of values

List of values