cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A058878 Triangle T(n,k) is the number of labeled graphs of even degree with n nodes and k edges (n >= 0, 0 <= k <= n(n-1)/2).

Table of values

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 4
12 3
13 0
14 0
15 1
16 0
17 0
18 10
19 15
20 12
21 15
22 10
23 0
24 0
25 1
26 1
27 0
28 0
29 20
30 45
31 72
32 160
33 240
34 195
35 120
36 96
37 60
38 15
39 0
40 0
41 0
42 1
43 0
44 0
45 35
46 105
47 252
48 805
49 1935
50 3255
51 4515
52 5481
53 5481
54 4515
55 3255
56 1935
57 805
58 252
59 105
60 35
61 0
62 0
63 1
64 1
65 0
66 0
67 56

List of values

[1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 4, 3, 0, 0, 1, 0, 0, 10, 15, 12, 15, 10, 0, 0, 1, 1, 0, 0, 20, 45, 72, 160, 240, 195, 120, 96, 60, 15, 0, 0, 0, 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]