A046752 - cp's OEIS frontend

A046752 Triangle read by rows: T(n,k) is the number of unlabeled nonseparable (or 2-connected) loopless multigraphs with n edges on k nodes and degree >= 3 at each node, n >= 3, 2 <= k <= floor(2*n/3).

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	3
12	5
13	1
14	4
15	13
16	4
17	1
18	6
19	26
20	24
21	5
22	1
23	7
24	47
25	84
26	38
27	1
28	9
29	78
30	233
31	216
32	23
33	1
34	11
35	126
36	557
37	914
38	314
39	16
40	1
41	13
42	188
43	1193
44	3077
45	2270
46	325
47	1
48	15
49	276
50	2355
51	8915
52	11592
53	4015
54	162
55	1
56	18
57	391
58	4370
59	23008
60	47079
61	31443
62	4495
63	66

[1, 1, 1, 1, 1, 2, 2, 1, 3, 5, 1, 4, 13, 4, 1, 6, 26, 24, 5, 1, 7, 47, 84, 38, 1, 9, 78, 233, 216, 23, 1, 11, 126, 557, 914, 314, 16, 1, 13, 188, 1193, 3077, 2270, 325, 1, 15, 276, 2355, 8915, 11592, 4015, 162, 1, 18, 391, 4370, 23008, 47079, 31443, 4495, 66]

cp's OEIS Frontend

A046752 Triangle read by rows: T(n,k) is the number of unlabeled nonseparable (or 2-connected) loopless multigraphs with n edges on k nodes and degree >= 3 at each node, n >= 3, 2 <= k <= floor(2*n/3).

Table of values

List of values