A350791 - cp's OEIS frontend

A350791 Triangle read by rows: T(n,k) is the number of digraphs on n labeled nodes with k arcs and a global source and sink, n >= 1, k = 0..max(1,n-1)*(n-2)+1.

n	a(n)
1	1
2	0
3	2
4	0
5	0
6	6
7	6
8	0
9	0
10	0
11	24
12	132
13	180
14	84
15	12
16	0
17	0
18	0
19	0
20	120
21	1800
22	8000
23	16160
24	18180
25	12580
26	5560
27	1560
28	260
29	20
30	0
31	0
32	0
33	0
34	0
35	720
36	22320
37	214800
38	999450
39	2764650
40	5125380
41	6844380
42	6882150
43	5355750
44	3277200
45	1586520
46	605370
47	179250
48	39900
49	6300
50	630
51	30

[1, 0, 2, 0, 0, 6, 6, 0, 0, 0, 24, 132, 180, 84, 12, 0, 0, 0, 0, 120, 1800, 8000, 16160, 18180, 12580, 5560, 1560, 260, 20, 0, 0, 0, 0, 0, 720, 22320, 214800, 999450, 2764650, 5125380, 6844380, 6882150, 5355750, 3277200, 1586520, 605370, 179250, 39900, 6300, 630, 30]

cp's OEIS Frontend

A350791 Triangle read by rows: T(n,k) is the number of digraphs on n labeled nodes with k arcs and a global source and sink, n >= 1, k = 0..max(1,n-1)*(n-2)+1.

Table of values

List of values