A062735 - cp's OEIS frontend

A062735 Triangular array T(n,k) giving number of weakly connected digraphs with n labeled nodes and k arcs (n >= 1, 0 <= k <= n(n-1)).

n	a(n)
1	1
2	0
3	2
4	1
5	0
6	0
7	12
8	20
9	15
10	6
11	1
12	0
13	0
14	0
15	128
16	432
17	768
18	920
19	792
20	495
21	220
22	66
23	12
24	1
25	0
26	0
27	0
28	0
29	2000
30	11104
31	33880
32	73480
33	123485
34	166860
35	184426
36	167900
37	125965
38	77520
39	38760
40	15504
41	4845
42	1140
43	190
44	20
45	1
46	0
47	0
48	0
49	0
50	0
51	41472
52	337920
53	1536000
54	5062080

[1, 0, 2, 1, 0, 0, 12, 20, 15, 6, 1, 0, 0, 0, 128, 432, 768, 920, 792, 495, 220, 66, 12, 1, 0, 0, 0, 0, 2000, 11104, 33880, 73480, 123485, 166860, 184426, 167900, 125965, 77520, 38760, 15504, 4845, 1140, 190, 20, 1, 0, 0, 0, 0, 0, 41472, 337920, 1536000, 5062080]

cp's OEIS Frontend

A062735 Triangular array T(n,k) giving number of weakly connected digraphs with n labeled nodes and k arcs (n >= 1, 0 <= k <= n(n-1)).

Table of values

List of values