A331509 - cp's OEIS frontend

A331509 Array read by antidiagonals: A(n,k) is the number of nonisomorphic T_0 n-regular set-systems on a k-set.

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	1
6	0
7	1
8	0
9	1
10	0
11	1
12	1
13	0
14	1
15	0
16	1
17	3
18	0
19	0
20	1
21	0
22	1
23	6
24	3
25	0
26	0
27	1
28	0
29	1
30	15
31	19
32	1
33	0
34	0
35	1
36	0
37	1
38	42
39	141
40	29
41	0
42	0
43	0
44	1
45	0
46	1
47	109
48	1571
49	769
50	23
51	0
52	0
53	0
54	1
55	0
56	1
57	320

[1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 3, 0, 0, 1, 0, 1, 6, 3, 0, 0, 1, 0, 1, 15, 19, 1, 0, 0, 1, 0, 1, 42, 141, 29, 0, 0, 0, 1, 0, 1, 109, 1571, 769, 23, 0, 0, 0, 1, 0, 1, 320]

cp's OEIS Frontend

A331509 Array read by antidiagonals: A(n,k) is the number of nonisomorphic T_0 n-regular set-systems on a k-set.

Table of values

List of values