A256156 - cp's OEIS frontend

A256156 Triangular array of numbers of 2-polymatroids of rank k on n unlabeled points, for n>=0, 0<=k<=2n.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	4
7	2
8	1
9	1
10	3
11	10
12	12
13	10
14	3
15	1
16	1
17	4
18	21
19	49
20	78
21	49
22	21
23	4
24	1
25	1
26	5
27	39
28	172
29	584
30	778
31	584
32	172
33	39
34	5
35	1
36	1
37	6
38	68
39	573
40	5236
41	18033
42	46661
43	18033
44	5236
45	573
46	68
47	6
48	1
49	1
50	7
51	112
52	1890
53	72205
54	971573
55	149636721
56	19498369
57	149636721
58	971573
59	72205
60	1890
61	112
62	7
63	1

[1, 1, 1, 1, 1, 2, 4, 2, 1, 1, 3, 10, 12, 10, 3, 1, 1, 4, 21, 49, 78, 49, 21, 4, 1, 1, 5, 39, 172, 584, 778, 584, 172, 39, 5, 1, 1, 6, 68, 573, 5236, 18033, 46661, 18033, 5236, 573, 68, 6, 1, 1, 7, 112, 1890, 72205, 971573, 149636721, 19498369, 149636721, 971573, 72205, 1890, 112, 7, 1]

cp's OEIS Frontend

A256156 Triangular array of numbers of 2-polymatroids of rank k on n unlabeled points, for n>=0, 0<=k<=2n.

Table of values

List of values