A350912 - cp's OEIS frontend

A350912 Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes whose underlying graph is k-regular, k = 0..n-1.

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	2
7	1
8	1
9	4
10	4
11	1
12	0
13	4
14	0
15	12
16	1
17	1
18	12
19	62
20	112
21	56
22	1
23	0
24	18
25	0
26	1602
27	0
28	456
29	1
30	1
31	40
32	2062
33	32263
34	92980
35	46791
36	6880
37	1
38	0
39	68
40	0
41	748576
42	0
43	11210264
44	0
45	191536
46	1
47	1
48	140
49	103827
50	19349672
51	616991524
52	3319462470
53	2729098064
54	292115960
55	9733056

[1, 1, 1, 1, 0, 2, 1, 1, 4, 4, 1, 0, 4, 0, 12, 1, 1, 12, 62, 112, 56, 1, 0, 18, 0, 1602, 0, 456, 1, 1, 40, 2062, 32263, 92980, 46791, 6880, 1, 0, 68, 0, 748576, 0, 11210264, 0, 191536, 1, 1, 140, 103827, 19349672, 616991524, 3319462470, 2729098064, 292115960, 9733056]

cp's OEIS Frontend

A350912 Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes whose underlying graph is k-regular, k = 0..n-1.

Table of values

List of values