A058669 - cp's OEIS frontend

A058669 Triangle T(n,k) read by rows, giving number of matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	7
8	7
9	1
10	1
11	15
12	36
13	15
14	1
15	1
16	31
17	171
18	171
19	31
20	1
21	1
22	63
23	813
24	2053
25	813
26	63
27	1
28	1
29	127
30	4012
31	33442
32	33442
33	4012
34	127
35	1
36	1
37	255
38	20891
39	1022217
40	8520812
41	1022217
42	20891
43	255
44	1
45	1
46	511

[1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 15, 36, 15, 1, 1, 31, 171, 171, 31, 1, 1, 63, 813, 2053, 813, 63, 1, 1, 127, 4012, 33442, 33442, 4012, 127, 1, 1, 255, 20891, 1022217, 8520812, 1022217, 20891, 255, 1, 1, 511]

cp's OEIS Frontend

A058669 Triangle T(n,k) read by rows, giving number of matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).

Table of values

List of values