A277504 - cp's OEIS frontend

A277504 Array read by descending antidiagonals: T(n,k) is the number of unoriented strings with n beads of k or fewer colors.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	3
12	3
13	1
14	0
15	1
16	4
17	6
18	6
19	1
20	0
21	1
22	5
23	10
24	18
25	10
26	1
27	0
28	1
29	6
30	15
31	40
32	45
33	20
34	1
35	0
36	1
37	7
38	21
39	75
40	136
41	135
42	36
43	1
44	0
45	1
46	8
47	28
48	126
49	325
50	544
51	378
52	72
53	1
54	0
55	1
56	9
57	36
58	196
59	666
60	1625
61	2080
62	1134
63	136
64	1
65	0
66	1
67	10
68	45
69	288
70	1225
71	3996
72	7875
73	8320
74	3321
75	272
76	1
77	0

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 3, 1, 0, 1, 4, 6, 6, 1, 0, 1, 5, 10, 18, 10, 1, 0, 1, 6, 15, 40, 45, 20, 1, 0, 1, 7, 21, 75, 136, 135, 36, 1, 0, 1, 8, 28, 126, 325, 544, 378, 72, 1, 0, 1, 9, 36, 196, 666, 1625, 2080, 1134, 136, 1, 0, 1, 10, 45, 288, 1225, 3996, 7875, 8320, 3321, 272, 1, 0]

cp's OEIS Frontend

A277504 Array read by descending antidiagonals: T(n,k) is the number of unoriented strings with n beads of k or fewer colors.

Table of values

List of values