A054669 - cp's OEIS frontend

A054669 Triangular array T(n,k) giving the number of labeled even graphs with n nodes and k edges for n >= 0 and 0 <= k <= n*(n-1-[0 == n mod 2])/2 (with no trailing zeros).

n	a(n)
0	1
1	1
2	1
3	1
4	0
5	0
6	1
7	1
8	0
9	0
10	4
11	3
12	1
13	0
14	0
15	10
16	15
17	12
18	15
19	10
20	0
21	0
22	1
23	1
24	0
25	0
26	20
27	45
28	72
29	160
30	240
31	195
32	120
33	96
34	60
35	15
36	1
37	0
38	0
39	35
40	105
41	252
42	805
43	1935
44	3255
45	4515
46	5481
47	5481
48	4515
49	3255
50	1935
51	805
52	252
53	105
54	35
55	0
56	0
57	1
58	1
59	0
60	0
61	56
62	210
63	672
64	2800
65	9320
66	24087

[1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 4, 3, 1, 0, 0, 10, 15, 12, 15, 10, 0, 0, 1, 1, 0, 0, 20, 45, 72, 160, 240, 195, 120, 96, 60, 15, 1, 0, 0, 35, 105, 252, 805, 1935, 3255, 4515, 5481, 5481, 4515, 3255, 1935, 805, 252, 105, 35, 0, 0, 1, 1, 0, 0, 56, 210, 672, 2800, 9320, 24087]

cp's OEIS Frontend

A054669 Triangular array T(n,k) giving the number of labeled even graphs with n nodes and k edges for n >= 0 and 0 <= k <= n*(n-1-[0 == n mod 2])/2 (with no trailing zeros).

Table of values

List of values