A115118 - cp's OEIS frontend

A115118 Number of imprimitive (periodic) n-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed.

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	10
13	1
14	11
15	5
16	20
17	1
18	36
19	1
20	58
21	11
22	95
23	1
24	196
25	4
26	317
27	30
28	598
29	1
30	1153
31	1
32	2068
33	95
34	3857
35	13
36	7488
37	1
38	13799
39	317
40	26288
41	1
42	50531
43	1
44	95422
45	1124
46	182363
47	1
48	351764
49	10
50	671144
51	3857
52	1290874
53	1
54	2492820
55	97
56	4794104
57	13799
58	9256397
59	1
60	17923218
61	1
62	34636835
63	49968
64	67110932
65	319

[0, 0, 1, 1, 2, 1, 3, 1, 4, 2, 5, 1, 10, 1, 11, 5, 20, 1, 36, 1, 58, 11, 95, 1, 196, 4, 317, 30, 598, 1, 1153, 1, 2068, 95, 3857, 13, 7488, 1, 13799, 317, 26288, 1, 50531, 1, 95422, 1124, 182363, 1, 351764, 10, 671144, 3857, 1290874, 1, 2492820, 97, 4794104, 13799, 9256397, 1, 17923218, 1, 34636835, 49968, 67110932, 319]

cp's OEIS Frontend

A115118 Number of imprimitive (periodic) n-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed.

Table of values

List of values