A174702 - cp's OEIS frontend

A174702 The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {1,2,3,4,5} for all i from 1 to n-1.

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	3600
8	15600
9	61872
10	236388
11	901748
12	3509106
13	13716168
14	53327912
15	205176192
16	780194112
17	2937412512
18	10991746368
19	40961976672
20	152144989056
21	563313879080
22	2078732476328
23	7644789439842
24	28024241472936
25	102432262746504

[1, 2, 6, 24, 120, 720, 3600, 15600, 61872, 236388, 901748, 3509106, 13716168, 53327912, 205176192, 780194112, 2937412512, 10991746368, 40961976672, 152144989056, 563313879080, 2078732476328, 7644789439842, 28024241472936, 102432262746504]

cp's OEIS Frontend

A174702 The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {1,2,3,4,5} for all i from 1 to n-1.

Table of values

List of values