A350487 - cp's OEIS frontend

A350487 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n labeled nodes with k arcs and a global source, n >= 1, k = 0..n*(n-1)/2.

n	a(n)
1	1
2	0
3	2
4	0
5	0
6	9
7	6
8	0
9	0
10	0
11	64
12	132
13	96
14	24
15	0
16	0
17	0
18	0
19	625
20	2640
21	4850
22	4900
23	2850
24	900
25	120
26	0
27	0
28	0
29	0
30	0
31	7776
32	55800
33	186480
34	379170
35	516660
36	491040
37	328680
38	152640
39	46980
40	8640
41	720
42	0
43	0
44	0
45	0
46	0
47	0
48	117649
49	1286670
50	6756120
51	22466010

[1, 0, 2, 0, 0, 9, 6, 0, 0, 0, 64, 132, 96, 24, 0, 0, 0, 0, 625, 2640, 4850, 4900, 2850, 900, 120, 0, 0, 0, 0, 0, 7776, 55800, 186480, 379170, 516660, 491040, 328680, 152640, 46980, 8640, 720, 0, 0, 0, 0, 0, 0, 117649, 1286670, 6756120, 22466010]

cp's OEIS Frontend

A350487 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n labeled nodes with k arcs and a global source, n >= 1, k = 0..n*(n-1)/2.

Table of values

List of values