A308747 - cp's OEIS frontend

A308747 Number of achiral m-color cyclic compositions of n (that is, number of cyclic compositions of n with reflection symmetry where each part of size m can be colored with one of m colors).

n	a(n)
1	1
2	3
3	6
4	13
5	23
6	44
7	73
8	131
9	210
10	365
11	575
12	984
13	1537
14	2611
15	4062
16	6877
17	10679
18	18052
19	28009
20	47315
21	73386
22	123933
23	192191
24	324528
25	503233
26	849699
27	1317558
28	2224621
29	3449495
30	5824220
31	9030985
32	15248099
33	23643522
34	39920141
35	61899647
36	104512392
37	162055489
38	273617107

[1, 3, 6, 13, 23, 44, 73, 131, 210, 365, 575, 984, 1537, 2611, 4062, 6877, 10679, 18052, 28009, 47315, 73386, 123933, 192191, 324528, 503233, 849699, 1317558, 2224621, 3449495, 5824220, 9030985, 15248099, 23643522, 39920141, 61899647, 104512392, 162055489, 273617107]

cp's OEIS Frontend

A308747 Number of achiral m-color cyclic compositions of n (that is, number of cyclic compositions of n with reflection symmetry where each part of size m can be colored with one of m colors).

Table of values

List of values