A123551 - cp's OEIS frontend

A123551 Triangle read by rows: T(n,k) gives number of unlabeled graphs without endpoints on n nodes and k edges, (n >= 0, 0 <= k <= n(n-1)/2).

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	1
14	1
15	1
16	0
17	0
18	1
19	1
20	2
21	4
22	3
23	2
24	1
25	1
26	1
27	0
28	0
29	1
30	1
31	2
32	6
33	8
34	13
35	16
36	13
37	8
38	5
39	2
40	1
41	1
42	1
43	0
44	0
45	1
46	1
47	2
48	6
49	10
50	22
51	48
52	76
53	97
54	102
55	84
56	60
57	39
58	20
59	10
60	5
61	2
62	1
63	1
64	1
65	0
66	0
67	1
68	1
69	2
70	6
71	10
72	25
73	64
74	152
75	331
76	617
77	930
78	1173
79	1253
80	1140

[1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 2, 4, 3, 2, 1, 1, 1, 0, 0, 1, 1, 2, 6, 8, 13, 16, 13, 8, 5, 2, 1, 1, 1, 0, 0, 1, 1, 2, 6, 10, 22, 48, 76, 97, 102, 84, 60, 39, 20, 10, 5, 2, 1, 1, 1, 0, 0, 1, 1, 2, 6, 10, 25, 64, 152, 331, 617, 930, 1173, 1253, 1140]

cp's OEIS Frontend

A123551 Triangle read by rows: T(n,k) gives number of unlabeled graphs without endpoints on n nodes and k edges, (n >= 0, 0 <= k <= n(n-1)/2).

Table of values

List of values