A115121 - cp's OEIS frontend

A115121 Number of imprimitive (periodic) bracelets (or necklaces) with n red or blue beads such that the beads switch colors when bracelet is turned over.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	11
13	1
14	11
15	5
16	22
17	1
18	37
19	1
20	64
21	11
22	95
23	1
24	210
25	4
26	317
27	30
28	625
29	1
30	1160
31	1
32	2122
33	95
34	3857
35	13
36	7612
37	1
38	13799
39	317
40	26518
41	1
42	50559
43	1
44	95887
45	1124
46	182363
47	1
48	352750
49	10
50	671150
51	3857
52	1292764
53	1
54	2492933
55	97
56	4797904
57	13799

[0, 1, 1, 2, 1, 3, 1, 4, 2, 5, 1, 11, 1, 11, 5, 22, 1, 37, 1, 64, 11, 95, 1, 210, 4, 317, 30, 625, 1, 1160, 1, 2122, 95, 3857, 13, 7612, 1, 13799, 317, 26518, 1, 50559, 1, 95887, 1124, 182363, 1, 352750, 10, 671150, 3857, 1292764, 1, 2492933, 97, 4797904, 13799]

cp's OEIS Frontend

A115121 Number of imprimitive (periodic) bracelets (or necklaces) with n red or blue beads such that the beads switch colors when bracelet is turned over.

Table of values

List of values