A242522 - cp's OEIS frontend

A242522 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 2.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	5
7	33
8	245
9	2053
10	19137
11	196705
12	2212037
13	27029085
14	356723177
15	5058388153
16	76712450925
17	1239124984693
18	21241164552785
19	385159565775633
20	7365975246680597
21	148182892455224845
22	3128251523599365177
23	69149857480654157545
24	1597343462243140957757

[0, 0, 0, 0, 1, 5, 33, 245, 2053, 19137, 196705, 2212037, 27029085, 356723177, 5058388153, 76712450925, 1239124984693, 21241164552785, 385159565775633, 7365975246680597, 148182892455224845, 3128251523599365177, 69149857480654157545, 1597343462243140957757]

cp's OEIS Frontend

A242522 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 2.

Table of values

List of values