A283615 - cp's OEIS frontend

A283615 Irregular triangle read by rows: T(n,k) is the number of necklaces of n 1's, n -1's, and k 0's such that no two adjacent elements are equal.

n	a(n)
0	1
1	1
2	2
3	1
4	1
5	2
6	5
7	4
8	2
9	1
10	2
11	7
12	16
13	18
14	12
15	4
16	1
17	2
18	11
19	32
20	70
21	92
22	82
23	40
24	10
25	1
26	2
27	13
28	56
29	166
30	348
31	510
32	520
33	350
34	140
35	26
36	1
37	2
38	17
39	88
40	336
41	932
42	1948
43	2992
44	3404
45	2756
46	1518
47	504
48	80
49	1
50	2
51	19
52	124
53	584
54	2056
55	5524
56	11444
57	18298
58	22428
59	20706
60	13944
61	6468
62	1848
63	246
64	1
65	2
66	23
67	168
68	944
69	3976
70	13120
71	34064
72	70380
73	115516

[1, 1, 2, 1, 1, 2, 5, 4, 2, 1, 2, 7, 16, 18, 12, 4, 1, 2, 11, 32, 70, 92, 82, 40, 10, 1, 2, 13, 56, 166, 348, 510, 520, 350, 140, 26, 1, 2, 17, 88, 336, 932, 1948, 2992, 3404, 2756, 1518, 504, 80, 1, 2, 19, 124, 584, 2056, 5524, 11444, 18298, 22428, 20706, 13944, 6468, 1848, 246, 1, 2, 23, 168, 944, 3976, 13120, 34064, 70380, 115516]

cp's OEIS Frontend

A283615 Irregular triangle read by rows: T(n,k) is the number of necklaces of n 1's, n -1's, and k 0's such that no two adjacent elements are equal.

Table of values

List of values