A330618 - cp's OEIS frontend

A330618 Triangle read by rows: T(n,k) is the number of n-bead necklaces using exactly k colors with no adjacent beads having the same color.

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	2
7	0
8	1
9	3
10	6
11	0
12	0
13	6
14	24
15	24
16	0
17	1
18	11
19	80
20	180
21	120
22	0
23	0
24	18
25	240
26	960
27	1440
28	720
29	0
30	1
31	33
32	696
33	4410
34	11340
35	12600
36	5040
37	0
38	0
39	58
40	1960
41	18760
42	73920
43	137760
44	120960
45	40320
46	0
47	1
48	105
49	5508
50	76368
51	433944
52	1209600
53	1753920
54	1270080
55	362880

[0, 0, 1, 0, 0, 2, 0, 1, 3, 6, 0, 0, 6, 24, 24, 0, 1, 11, 80, 180, 120, 0, 0, 18, 240, 960, 1440, 720, 0, 1, 33, 696, 4410, 11340, 12600, 5040, 0, 0, 58, 1960, 18760, 73920, 137760, 120960, 40320, 0, 1, 105, 5508, 76368, 433944, 1209600, 1753920, 1270080, 362880]

cp's OEIS Frontend

A330618 Triangle read by rows: T(n,k) is the number of n-bead necklaces using exactly k colors with no adjacent beads having the same color.

Table of values

List of values