A350797 - cp's OEIS frontend

A350797 Triangle read by rows: T(n,k) is the number of digraphs on n unlabeled nodes with k arcs and a global source (or sink), n >= 1, k = 0..(n-1)^2.

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	2
7	2
8	1
9	0
10	0
11	0
12	4
13	11
14	19
15	15
16	8
17	2
18	1
19	0
20	0
21	0
22	0
23	9
24	45
25	157
26	319
27	453
28	455
29	352
30	199
31	93
32	32
33	9
34	2
35	1
36	0
37	0
38	0
39	0
40	0
41	20
42	167
43	928
44	3395
45	9015
46	18172
47	29089
48	37688
49	40446
50	36267
51	27476
52	17560
53	9543
54	4354
55	1688
56	547
57	157
58	36
59	9
60	2
61	1

[1, 0, 1, 0, 0, 2, 2, 1, 0, 0, 0, 4, 11, 19, 15, 8, 2, 1, 0, 0, 0, 0, 9, 45, 157, 319, 453, 455, 352, 199, 93, 32, 9, 2, 1, 0, 0, 0, 0, 0, 20, 167, 928, 3395, 9015, 18172, 29089, 37688, 40446, 36267, 27476, 17560, 9543, 4354, 1688, 547, 157, 36, 9, 2, 1]

cp's OEIS Frontend

A350797 Triangle read by rows: T(n,k) is the number of digraphs on n unlabeled nodes with k arcs and a global source (or sink), n >= 1, k = 0..(n-1)^2.

Table of values

List of values