A208970 - cp's OEIS frontend

A208970 T(n,k) is the number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero and first and second differences in -k..k.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	2
14	3
15	1
16	1
17	2
18	2
19	4
20	3
21	2
22	1
23	2
24	2
25	8
26	9
27	8
28	2
29	1
30	2
31	5
32	11
33	19
34	29
35	15
36	4
37	1
38	3
39	5
40	18
41	40
42	90
43	87
44	42
45	4
46	1
47	3
48	5
49	24
50	77
51	221
52	371
53	325
54	94
55	7
56	1
57	3
58	8
59	35
60	130
61	495
62	1185
63	1755
64	1148
65	246
66	7
67	1
68	3
69	8
70	45
71	213
72	967
73	3186
74	6883
75	8092
76	4168
77	613
78	14
79	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 1, 1, 2, 2, 4, 3, 2, 1, 2, 2, 8, 9, 8, 2, 1, 2, 5, 11, 19, 29, 15, 4, 1, 3, 5, 18, 40, 90, 87, 42, 4, 1, 3, 5, 24, 77, 221, 371, 325, 94, 7, 1, 3, 8, 35, 130, 495, 1185, 1755, 1148, 246, 7, 1, 3, 8, 45, 213, 967, 3186, 6883, 8092, 4168, 613, 14, 1]

cp's OEIS Frontend

A208970 T(n,k) is the number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero and first and second differences in -k..k.

Table of values

List of values