A185140 - cp's OEIS frontend

A185140 Irregular triangle E(n,g) counting not necessarily connected 4-regular simple graphs on n vertices with girth exactly g.

n	a(n)
5	1
6	1
7	2
8	5
9	1
10	16
11	0
12	58
13	2
14	264
15	2
16	1535
17	12
18	10755
19	31
20	87973
21	220
22	803973
23	1606
24	8020967
25	16829
26	86029760
27	193900
28	983431053
29	2452820
30	11913921910
31	32670331
32	1
33	152352965278
34	456028487
35	2
36	2050065073002
37	6636066126
38	8
39	28466234288520
40	100135577863
41	131
42	8020967
43	16829

[1, 1, 2, 5, 1, 16, 0, 58, 2, 264, 2, 1535, 12, 10755, 31, 87973, 220, 803973, 1606, 8020967, 16829, 86029760, 193900, 983431053, 2452820, 11913921910, 32670331, 1, 152352965278, 456028487, 2, 2050065073002, 6636066126, 8, 28466234288520, 100135577863, 131, 8020967, 16829]

cp's OEIS Frontend

A185140 Irregular triangle E(n,g) counting not necessarily connected 4-regular simple graphs on n vertices with girth exactly g.

Table of values

List of values