A126066 - cp's OEIS frontend

A126066 Triangle read by rows: T(n,k) is the number of unlabeled digraphs on n nodes with k arcs up to reversing the arcs, k=0..n*(n-1).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	3
9	3
10	1
11	1
12	1
13	1
14	4
15	9
16	18
17	24
18	30
19	24
20	18
21	9
22	4
23	1
24	1
25	1
26	1
27	4
28	11
29	38
30	89
31	210
32	382
33	616
34	787
35	880
36	787
37	616
38	382
39	210
40	89
41	38
42	11
43	4
44	1
45	1
46	1
47	1
48	4
49	12
50	48
51	165
52	567
53	1703
54	4623
55	10836
56	22273
57	39866
58	62650
59	86209
60	104456
61	111256
62	104456
63	86209
64	62650
65	39866
66	22273
67	10836
68	4623
69	1703
70	567
71	165
72	48
73	12
74	4
75	1
76	1

[1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 1, 1, 1, 1, 4, 9, 18, 24, 30, 24, 18, 9, 4, 1, 1, 1, 1, 4, 11, 38, 89, 210, 382, 616, 787, 880, 787, 616, 382, 210, 89, 38, 11, 4, 1, 1, 1, 1, 4, 12, 48, 165, 567, 1703, 4623, 10836, 22273, 39866, 62650, 86209, 104456, 111256, 104456, 86209, 62650, 39866, 22273, 10836, 4623, 1703, 567, 165, 48, 12, 4, 1, 1]

cp's OEIS Frontend

A126066 Triangle read by rows: T(n,k) is the number of unlabeled digraphs on n nodes with k arcs up to reversing the arcs, k=0..n*(n-1).

Table of values

List of values