A053534 - cp's OEIS frontend

A053534 Triangle T(n,k) giving number of pairwise non-isomorphic (i.e., unlabeled) matroids of rank k on n points (n >= 0, 0 <= k <= n).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	7
13	4
14	1
15	1
16	5
17	13
18	13
19	5
20	1
21	1
22	6
23	23
24	38
25	23
26	6
27	1
28	1
29	7
30	37
31	108
32	108
33	37
34	7
35	1
36	1
37	8
38	58
39	325
40	940
41	325
42	58
43	8
44	1
45	1
46	9
47	87
48	1275
49	190214
50	190214
51	1275
52	87
53	9
54	1

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 7, 4, 1, 1, 5, 13, 13, 5, 1, 1, 6, 23, 38, 23, 6, 1, 1, 7, 37, 108, 108, 37, 7, 1, 1, 8, 58, 325, 940, 325, 58, 8, 1, 1, 9, 87, 1275, 190214, 190214, 1275, 87, 9, 1]

cp's OEIS Frontend

A053534 Triangle T(n,k) giving number of pairwise non-isomorphic (i.e., unlabeled) matroids of rank k on n points (n >= 0, 0 <= k <= n).

Table of values

List of values