A374162 - cp's OEIS frontend

A374162 a(n) is the number of permutations of size n ending with n whose n left-to-right maxima are consecutive and nonadjacent.

n	a(n)
1	1
2	0
3	1
4	2
5	8
6	36
7	198
8	1272
9	9384
10	78240
11	728040
12	7482960
13	84224160
14	1030569120
15	13623366960
16	193515477120
17	2939860748160
18	47568519613440
19	816772822750080
20	14833749363552000
21	284114908317542400
22	5723753780712844800
23	120995656719515424000
24	2678008828724659584000

[1, 0, 1, 2, 8, 36, 198, 1272, 9384, 78240, 728040, 7482960, 84224160, 1030569120, 13623366960, 193515477120, 2939860748160, 47568519613440, 816772822750080, 14833749363552000, 284114908317542400, 5723753780712844800, 120995656719515424000, 2678008828724659584000]

cp's OEIS Frontend

A374162 a(n) is the number of permutations of size n ending with n whose n left-to-right maxima are consecutive and nonadjacent.

Table of values

List of values