A242524 - cp's OEIS frontend

A242524 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 4.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	24
11	504
12	8320
13	131384
14	2070087
15	33465414
16	561681192
17	9842378284
18	180447203232
19	3462736479324
20	69517900171056
21	1458720714556848
22	31955023452174314
23	729874911380470641
24	17359562438053760533
25	429391730229931885360

[0, 0, 0, 0, 0, 0, 0, 0, 1, 24, 504, 8320, 131384, 2070087, 33465414, 561681192, 9842378284, 180447203232, 3462736479324, 69517900171056, 1458720714556848, 31955023452174314, 729874911380470641, 17359562438053760533, 429391730229931885360]

cp's OEIS Frontend

A242524 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 4.

Table of values

List of values