A346319 - cp's OEIS frontend

A346319 Number of permutations of [n] having four cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i.

n	a(n)
4	1
5	10
6	85
7	665
8	5033
9	37632
10	280760
11	2100560
12	15799344
13	119598336
14	911432704
15	6991479040
16	53960703232
17	418803056640
18	3266623490048
19	25590201536512
20	201220024528896
21	1587256170708992
22	12553933544030208
23	99511621823561728
24	790240133265817600
25	6284788112052715520

[1, 10, 85, 665, 5033, 37632, 280760, 2100560, 15799344, 119598336, 911432704, 6991479040, 53960703232, 418803056640, 3266623490048, 25590201536512, 201220024528896, 1587256170708992, 12553933544030208, 99511621823561728, 790240133265817600, 6284788112052715520]

cp's OEIS Frontend

A346319 Number of permutations of [n] having four cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i.

Table of values

List of values