A350491 - cp's OEIS frontend

A350491 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n unlabeled nodes with k arcs and a global source and sink, n >= 1, k = 0..n*(n-1)/2.

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	1
7	1
8	0
9	0
10	0
11	1
12	4
13	4
14	1
15	0
16	0
17	0
18	0
19	1
20	9
21	25
22	32
23	22
24	8
25	1
26	0
27	0
28	0
29	0
30	0
31	1
32	17
33	92
34	259
35	441
36	496
37	379
38	195
39	66
40	13
41	1
42	0
43	0
44	0
45	0
46	0
47	0
48	1
49	28
50	259
51	1286
52	4026
53	8754
54	13930
55	16686
56	15289
57	10785
58	5842
59	2397
60	722
61	151
62	19
63	1

[1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 4, 4, 1, 0, 0, 0, 0, 1, 9, 25, 32, 22, 8, 1, 0, 0, 0, 0, 0, 1, 17, 92, 259, 441, 496, 379, 195, 66, 13, 1, 0, 0, 0, 0, 0, 0, 1, 28, 259, 1286, 4026, 8754, 13930, 16686, 15289, 10785, 5842, 2397, 722, 151, 19, 1]

cp's OEIS Frontend

A350491 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n unlabeled nodes with k arcs and a global source and sink, n >= 1, k = 0..n*(n-1)/2.

Table of values

List of values