A213942 - cp's OEIS frontend

A213942 a(n) is the number of representative two-color bracelets (necklaces with turnover allowed) with n beads for n >= 2.

n	a(n)
2	1
3	1
4	3
5	3
6	7
7	8
8	18
9	22
10	46
11	62
12	136
13	189
14	409
15	611
16	1344
17	2055
18	4535
19	7154
20	15881
21	25481
22	56533
23	92204
24	204759
25	337593
26	748665
27	1246862
28	2762111
29	4636389
30	10253938
31	17334800
32	38278784
33	65108061
34	143534770
35	245492243
36	540353057
37	928772649
38	2041154125

[1, 1, 3, 3, 7, 8, 18, 22, 46, 62, 136, 189, 409, 611, 1344, 2055, 4535, 7154, 15881, 25481, 56533, 92204, 204759, 337593, 748665, 1246862, 2762111, 4636389, 10253938, 17334800, 38278784, 65108061, 143534770, 245492243, 540353057, 928772649, 2041154125]

cp's OEIS Frontend

A213942 a(n) is the number of representative two-color bracelets (necklaces with turnover allowed) with n beads for n >= 2.

Table of values

List of values