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.

A054733 Triangle of number of (weakly) connected unlabeled digraphs with n nodes and k arcs (n >=2, k >= 1).

Table of values

n a(n)
2 1
3 1
4 0
5 3
6 4
7 4
8 1
9 1
10 0
11 0
12 8
13 22
14 37
15 47
16 38
17 27
18 13
19 5
20 1
21 1
22 0
23 0
24 0
25 27
26 108
27 326
28 667
29 1127
30 1477
31 1665
32 1489
33 1154
34 707
35 379
36 154
37 61
38 16
39 5
40 1
41 1
42 0
43 0
44 0
45 0
46 91
47 582
48 2432
49 7694
50 19646
51 42148
52 77305
53 122953
54 170315
55 206982
56 220768
57 207301
58 171008

List of values

[1, 1, 0, 3, 4, 4, 1, 1, 0, 0, 8, 22, 37, 47, 38, 27, 13, 5, 1, 1, 0, 0, 0, 27, 108, 326, 667, 1127, 1477, 1665, 1489, 1154, 707, 379, 154, 61, 16, 5, 1, 1, 0, 0, 0, 0, 91, 582, 2432, 7694, 19646, 42148, 77305, 122953, 170315, 206982, 220768, 207301, 171008]