A057278 - cp's OEIS frontend

A057278 Triangle T(n,k) of number of digraphs with a source and a sink on n unlabeled nodes and 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	11
17	31
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	23
31	152
32	486
33	992
34	1419
35	1641
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	42
53	517
54	3194
55	12174
56	32860
57	68423
58	116168
59	166164
60	204867
61	219906
62	206993
63	170922
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, 11, 31, 45, 38, 27, 13, 5, 1, 1, 0, 0, 0, 0, 1, 23, 152, 486, 992, 1419, 1641, 1485, 1152, 707, 379, 154, 61, 16, 5, 1, 1, 0, 0, 0, 0, 0, 1, 42, 517, 3194, 12174, 32860, 68423, 116168, 166164, 204867, 219906, 206993, 170922, 124088, 78809, 43860, 21209, 8951, 3242, 1043, 288, 76, 17, 5, 1, 1]

cp's OEIS Frontend

A057278 Triangle T(n,k) of number of digraphs with a source and a sink on n unlabeled nodes and k arcs, k=0..n*(n-1).

Table of values

List of values