A361355 - cp's OEIS frontend

A361355 Triangle read by rows: T(n,k) is the number of simple series-parallel matroids on [n] with rank k, 1 <= k <= n.

n	a(n)
1	1
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	0
13	15
14	1
15	0
16	0
17	0
18	0
19	75
20	1
21	0
22	0
23	0
24	0
25	735
26	280
27	1
28	0
29	0
30	0
31	0
32	0
33	9345
34	938
35	1
36	0
37	0
38	0
39	0
40	0
41	76545
42	77805
43	2989
44	1
45	0
46	0
47	0
48	0
49	0
50	0
51	1865745
52	536725
53	9285
54	1
55	0
56	0
57	0
58	0
59	0
60	0
61	13835745
62	27754650
63	3334870
64	28446
65	1
66	0

[1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 15, 1, 0, 0, 0, 0, 75, 1, 0, 0, 0, 0, 735, 280, 1, 0, 0, 0, 0, 0, 9345, 938, 1, 0, 0, 0, 0, 0, 76545, 77805, 2989, 1, 0, 0, 0, 0, 0, 0, 1865745, 536725, 9285, 1, 0, 0, 0, 0, 0, 0, 13835745, 27754650, 3334870, 28446, 1, 0]

cp's OEIS Frontend

A361355 Triangle read by rows: T(n,k) is the number of simple series-parallel matroids on [n] with rank k, 1 <= k <= n.

Table of values

List of values