A187251 - cp's OEIS frontend

A187251 Number of permutations of [n] having no cycle with 3 or more alternating runs (it is assumed that the smallest element of a cycle is in the first position).

n	a(n)
0	1
1	1
2	2
3	6
4	22
5	94
6	460
7	2532
8	15420
9	102620
10	739512
11	5729192
12	47429896
13	417429800
14	3888426512
15	38192416048
16	394239339792
17	4264424937488
18	48212317486112
19	568395755184224
20	6973300915138656
21	88860103591344864
22	1174131206436335296
23	16061756166912244800

[1, 1, 2, 6, 22, 94, 460, 2532, 15420, 102620, 739512, 5729192, 47429896, 417429800, 3888426512, 38192416048, 394239339792, 4264424937488, 48212317486112, 568395755184224, 6973300915138656, 88860103591344864, 1174131206436335296, 16061756166912244800]

cp's OEIS Frontend

A187251 Number of permutations of [n] having no cycle with 3 or more alternating runs (it is assumed that the smallest element of a cycle is in the first position).

Table of values

List of values