A333158 - cp's OEIS frontend

A333158 Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1.

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	1
7	1
8	1
9	0
10	2
11	0
12	1
13	1
14	3
15	8
16	8
17	3
18	1
19	1
20	0
21	38
22	0
23	38
24	0
25	1
26	1
27	15
28	208
29	730
30	730
31	208
32	15
33	1
34	1
35	0
36	1348
37	0
38	20670
39	0
40	1348
41	0
42	1
43	1
44	105
45	10126
46	188790
47	781578
48	781578
49	188790
50	10126
51	105
52	1
53	1
54	0
55	86174
56	0
57	37885204
58	0
59	37885204
60	0
61	86174
62	0
63	1

[1, 0, 1, 1, 1, 1, 1, 1, 0, 2, 0, 1, 1, 3, 8, 8, 3, 1, 1, 0, 38, 0, 38, 0, 1, 1, 15, 208, 730, 730, 208, 15, 1, 1, 0, 1348, 0, 20670, 0, 1348, 0, 1, 1, 105, 10126, 188790, 781578, 781578, 188790, 10126, 105, 1, 1, 0, 86174, 0, 37885204, 0, 37885204, 0, 86174, 0, 1]

cp's OEIS Frontend

A333158 Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1.

Table of values

List of values