A184940 - cp's OEIS frontend

A184940 Irregular triangle C(n,g) counting the 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	57
13	2
14	263
15	2
16	1532
17	12
18	10747
19	31
20	87948
21	220
22	803885
23	1606
24	8020590
25	16828
26	86027734
27	193900
28	983417704
29	2452818
30	11913817317
31	32670329
32	1
33	152352034707
34	456028472
35	2
36	2050055948375
37	6636066091
38	8
39	28466137588780
40	100135577616
41	131

[1, 1, 2, 5, 1, 16, 0, 57, 2, 263, 2, 1532, 12, 10747, 31, 87948, 220, 803885, 1606, 8020590, 16828, 86027734, 193900, 983417704, 2452818, 11913817317, 32670329, 1, 152352034707, 456028472, 2, 2050055948375, 6636066091, 8, 28466137588780, 100135577616, 131]

cp's OEIS Frontend

A184940 Irregular triangle C(n,g) counting the connected 4-regular simple graphs on n vertices with girth exactly g.

Table of values

List of values