A184185 - cp's OEIS frontend

A184185 Number of permutations of {1,2,...,n} having no cycles of the form (i, i+1, i+2, ..., i+j-1) (j >= 1).

n	a(n)
0	1
1	0
2	0
3	1
4	6
5	34
6	216
7	1566
8	12840
9	117696
10	1193760
11	13280520
12	160841520
13	2107021680
14	29689833600
15	447821503920
16	7199590366080
17	122907276334080
18	2220524598297600
19	42328747652446080
20	849064844592518400
21	17877531486897734400
22	394246607165708774400

[1, 0, 0, 1, 6, 34, 216, 1566, 12840, 117696, 1193760, 13280520, 160841520, 2107021680, 29689833600, 447821503920, 7199590366080, 122907276334080, 2220524598297600, 42328747652446080, 849064844592518400, 17877531486897734400, 394246607165708774400]

cp's OEIS Frontend

A184185 Number of permutations of {1,2,...,n} having no cycles of the form (i, i+1, i+2, ..., i+j-1) (j >= 1).

Table of values

List of values