A057270 - cp's OEIS frontend

A057270 Triangle T(n,k) of number of unilaterally connected digraphs on n unlabeled nodes with k arcs, k=0..n*(n-1).

n	a(n)
1	1
2	0
3	1
4	1
5	0
6	0
7	1
8	4
9	4
10	1
11	1
12	0
13	0
14	0
15	1
16	10
17	30
18	45
19	38
20	27
21	13
22	5
23	1
24	1
25	0
26	0
27	0
28	0
29	1
30	20
31	136
32	462
33	972
34	1412
35	1639
36	1485
37	1152
38	707
39	379
40	154
41	61
42	16
43	5
44	1
45	1
46	0
47	0
48	0
49	0
50	0
51	1
52	35
53	437
54	2833
55	11325
56	31615
57	67207
58	115344
59	165762
60	204723
61	219866
62	206986
63	170920
64	124088
65	78809
66	43860
67	21209
68	8951
69	3242
70	1043
71	288
72	76
73	17
74	5
75	1
76	1

[1, 0, 1, 1, 0, 0, 1, 4, 4, 1, 1, 0, 0, 0, 1, 10, 30, 45, 38, 27, 13, 5, 1, 1, 0, 0, 0, 0, 1, 20, 136, 462, 972, 1412, 1639, 1485, 1152, 707, 379, 154, 61, 16, 5, 1, 1, 0, 0, 0, 0, 0, 1, 35, 437, 2833, 11325, 31615, 67207, 115344, 165762, 204723, 219866, 206986, 170920, 124088, 78809, 43860, 21209, 8951, 3242, 1043, 288, 76, 17, 5, 1, 1]

cp's OEIS Frontend

A057270 Triangle T(n,k) of number of unilaterally connected digraphs on n unlabeled nodes with k arcs, k=0..n*(n-1).

Table of values

List of values