A242527 - cp's OEIS frontend

A242527 Number of cyclic arrangements (up to direction) of {0,1,...,n-1} such that the sum of any two neighbors is a prime.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	2
8	6
9	6
10	22
11	80
12	504
13	840
14	6048
15	3888
16	37524
17	72976
18	961776
19	661016
20	11533030
21	7544366
22	133552142
23	208815294
24	5469236592
25	6429567323
26	153819905698
27	182409170334
28	4874589558919
29	7508950009102
30	209534365631599

[0, 0, 0, 0, 1, 1, 2, 6, 6, 22, 80, 504, 840, 6048, 3888, 37524, 72976, 961776, 661016, 11533030, 7544366, 133552142, 208815294, 5469236592, 6429567323, 153819905698, 182409170334, 4874589558919, 7508950009102, 209534365631599]

cp's OEIS Frontend

A242527 Number of cyclic arrangements (up to direction) of {0,1,...,n-1} such that the sum of any two neighbors is a prime.

Table of values

List of values