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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.

A185193 Number of unlabeled digraphs on n vertices such that every vertex has outdegree 3.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 13
6 1499
7 257290
8 56150820
9 14971125930
10 4829990898461
11 1864386642498918
12 851204815909786099
13 454661054439318678263
14 281270600132956104641972
15 199701092658236514672384967
16 161392692052798327047616107614
17 147373164027242947672475065773269

List of values

[0, 0, 0, 1, 13, 1499, 257290, 56150820, 14971125930, 4829990898461, 1864386642498918, 851204815909786099, 454661054439318678263, 281270600132956104641972, 199701092658236514672384967, 161392692052798327047616107614, 147373164027242947672475065773269]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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