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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.

A054548 Triangular array giving number of labeled graphs on n unisolated nodes and k=0...n*(n-1)/2 edges.

Table of values

n a(n)
0 1
1 0
2 0
3 1
4 0
5 0
6 3
7 1
8 0
9 0
10 3
11 16
12 15
13 6
14 1
15 0
16 0
17 0
18 30
19 135
20 222
21 205
22 120
23 45
24 10
25 1
26 0
27 0
28 0
29 15
30 330
31 1581
32 3760
33 5715
34 6165
35 4945
36 2997
37 1365
38 455
39 105
40 15
41 1
42 0
43 0
44 0
45 0
46 315
47 4410
48 23604
49 73755
50 159390
51 259105
52 331716
53 343161
54 290745
55 202755
56 116175

List of values

[1, 0, 0, 1, 0, 0, 3, 1, 0, 0, 3, 16, 15, 6, 1, 0, 0, 0, 30, 135, 222, 205, 120, 45, 10, 1, 0, 0, 0, 15, 330, 1581, 3760, 5715, 6165, 4945, 2997, 1365, 455, 105, 15, 1, 0, 0, 0, 0, 315, 4410, 23604, 73755, 159390, 259105, 331716, 343161, 290745, 202755, 116175]