A002075 - cp's OEIS frontend

A002075 Number of equivalence classes with primitive period n of base 3 necklaces, where necklaces are equivalent under rotation and permutation of symbols.

n	a(n)
1	1
2	1
3	2
4	4
5	8
6	22
7	52
8	140
9	366
10	992
11	2684
12	7404
13	20440
14	56992
15	159440
16	448540
17	1266080
18	3587610
19	10195276
20	29057520
21	83018728
22	237737984
23	682196948
24	1961323740
25	5648590728
26	16294032160
27	47071589778
28	136171440600

[1, 1, 2, 4, 8, 22, 52, 140, 366, 992, 2684, 7404, 20440, 56992, 159440, 448540, 1266080, 3587610, 10195276, 29057520, 83018728, 237737984, 682196948, 1961323740, 5648590728, 16294032160, 47071589778, 136171440600]

cp's OEIS Frontend

A002075 Number of equivalence classes with primitive period n of base 3 necklaces, where necklaces are equivalent under rotation and permutation of symbols.

Table of values

List of values