A242523 - cp's OEIS frontend

A242523 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 3.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	11
9	125
10	1351
11	15330
12	184846
13	2382084
14	32795170
15	481379278
16	7513591430
17	124363961357
18	2176990766569
19	40199252548280
20	781143277669538
21	15937382209774353
22	340696424417421213
23	7616192835573406931
24	177723017354688250713
25	4321711817908214684734

[0, 0, 0, 0, 0, 0, 1, 11, 125, 1351, 15330, 184846, 2382084, 32795170, 481379278, 7513591430, 124363961357, 2176990766569, 40199252548280, 781143277669538, 15937382209774353, 340696424417421213, 7616192835573406931, 177723017354688250713, 4321711817908214684734]

cp's OEIS Frontend

A242523 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at least 3.

Table of values

List of values