A186755 - cp's OEIS frontend

A186755 Number of permutations of {1,2,...,n} having no increasing cycles. A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) .

n	a(n)
0	1
1	0
2	0
3	1
4	5
5	23
6	129
7	894
8	7202
9	65085
10	651263
11	7161713
12	85922825
13	1116946192
14	15637356864
15	234562319757
16	3753007054781
17	63801128569995
18	1148420035784849
19	21819978138955622
20	436399552962252082
21	9164390639379582121
22	201616594791853840063

[1, 0, 0, 1, 5, 23, 129, 894, 7202, 65085, 651263, 7161713, 85922825, 1116946192, 15637356864, 234562319757, 3753007054781, 63801128569995, 1148420035784849, 21819978138955622, 436399552962252082, 9164390639379582121, 201616594791853840063]

cp's OEIS Frontend

A186755 Number of permutations of {1,2,...,n} having no increasing cycles. A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) .

Table of values

List of values