A320751 - cp's OEIS frontend

A320751 Array read by antidiagonals: T(n,k) is the number of chiral pairs of color patterns (set partitions) in a row of length n using k or fewer colors (subsets).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	1
14	2
15	0
16	0
17	0
18	1
19	4
20	6
21	0
22	0
23	0
24	1
25	4
26	16
27	12
28	0
29	0
30	0
31	1
32	4
33	20
34	52
35	28
36	0
37	0
38	0
39	1
40	4
41	20
42	80
43	169
44	56
45	0
46	0
47	0
48	1
49	4
50	20
51	86
52	336
53	520
54	120
55	0
56	0
57	0
58	1
59	4
60	20
61	86
62	400
63	1344
64	1600
65	240
66	0
67	0
68	0
69	1
70	4
71	20
72	86
73	409
74	1852
75	5440
76	4840
77	496
78	0

[0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 0, 1, 4, 6, 0, 0, 0, 1, 4, 16, 12, 0, 0, 0, 1, 4, 20, 52, 28, 0, 0, 0, 1, 4, 20, 80, 169, 56, 0, 0, 0, 1, 4, 20, 86, 336, 520, 120, 0, 0, 0, 1, 4, 20, 86, 400, 1344, 1600, 240, 0, 0, 0, 1, 4, 20, 86, 409, 1852, 5440, 4840, 496, 0]

cp's OEIS Frontend

A320751 Array read by antidiagonals: T(n,k) is the number of chiral pairs of color patterns (set partitions) in a row of length n using k or fewer colors (subsets).

Table of values

List of values