A339160 - cp's OEIS frontend

A339160 Triangle read by rows: T(n,k) is the number of unlabeled nonseparable (or 2-connected) loopless multigraphs with n edges and k nodes (n >= 1, 2 <= k <= n + 1).

n	a(n)
1	1
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	1
10	0
11	1
12	2
13	2
14	1
15	0
16	1
17	3
18	6
19	3
20	1
21	0
22	1
23	4
24	11
25	11
26	4
27	1
28	0
29	1
30	5
31	22
32	33
33	23
34	5
35	1
36	0
37	1
38	7
39	38
40	89
41	96
42	40
43	7
44	1
45	0
46	1
47	8
48	63
49	212
50	345
51	234
52	70
53	8
54	1
55	0
56	1
57	10
58	98
59	463
60	1083
61	1146
62	546
63	110
64	10
65	1
66	0
67	1
68	12
69	151
70	943
71	3068
72	4739
73	3505
74	1169
75	176
76	12
77	1
78	0

[1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 2, 2, 1, 0, 1, 3, 6, 3, 1, 0, 1, 4, 11, 11, 4, 1, 0, 1, 5, 22, 33, 23, 5, 1, 0, 1, 7, 38, 89, 96, 40, 7, 1, 0, 1, 8, 63, 212, 345, 234, 70, 8, 1, 0, 1, 10, 98, 463, 1083, 1146, 546, 110, 10, 1, 0, 1, 12, 151, 943, 3068, 4739, 3505, 1169, 176, 12, 1, 0]

cp's OEIS Frontend

A339160 Triangle read by rows: T(n,k) is the number of unlabeled nonseparable (or 2-connected) loopless multigraphs with n edges and k nodes (n >= 1, 2 <= k <= n + 1).

Table of values

List of values