A115115 - cp's OEIS frontend

A115115 Number of 3-asymmetric rhythm cycles: binary necklaces of length 3n subject to the restriction that for any k if the k-th bead is of color 1 then the (k+n)-th and (k+2n)-th beads (modulo 3n) are of color 0.

n	a(n)
1	2
2	4
3	8
4	24
5	70
6	232
7	782
8	2744
9	9710
10	34990
11	127102
12	466152
13	1720742
14	6391714
15	23860936
16	89479864
17	336860182
18	1272587758
19	4822419422
20	18325211326
21	69810262088
22	266548336954
23	1019836872142
24	3909374909672
25	15011998757958

[2, 4, 8, 24, 70, 232, 782, 2744, 9710, 34990, 127102, 466152, 1720742, 6391714, 23860936, 89479864, 336860182, 1272587758, 4822419422, 18325211326, 69810262088, 266548336954, 1019836872142, 3909374909672, 15011998757958]

cp's OEIS Frontend

A115115 Number of 3-asymmetric rhythm cycles: binary necklaces of length 3n subject to the restriction that for any k if the k-th bead is of color 1 then the (k+n)-th and (k+2n)-th beads (modulo 3n) are of color 0.

Table of values

List of values