A081720 - cp's OEIS frontend

A081720 Triangle T(n,k) read by rows, giving number of bracelets (turnover necklaces) with n beads of k colors (n >= 1, 1 <= k <= n).

n	a(n)
1	1
2	1
3	3
4	1
5	4
6	10
7	1
8	6
9	21
10	55
11	1
12	8
13	39
14	136
15	377
16	1
17	13
18	92
19	430
20	1505
21	4291
22	1
23	18
24	198
25	1300
26	5895
27	20646
28	60028
29	1
30	30
31	498
32	4435
33	25395
34	107331
35	365260
36	1058058
37	1
38	46
39	1219
40	15084
41	110085
42	563786
43	2250311
44	7472984
45	21552969
46	1
47	78
48	3210
49	53764
50	493131
51	3037314

[1, 1, 3, 1, 4, 10, 1, 6, 21, 55, 1, 8, 39, 136, 377, 1, 13, 92, 430, 1505, 4291, 1, 18, 198, 1300, 5895, 20646, 60028, 1, 30, 498, 4435, 25395, 107331, 365260, 1058058, 1, 46, 1219, 15084, 110085, 563786, 2250311, 7472984, 21552969, 1, 78, 3210, 53764, 493131, 3037314]

cp's OEIS Frontend

A081720 Triangle T(n,k) read by rows, giving number of bracelets (turnover necklaces) with n beads of k colors (n >= 1, 1 <= k <= n).

Table of values

List of values