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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.

A054545 Number of labeled digraphs on n unisolated nodes (inverse binomial transform of A053763).

Table of values

n a(n)
0 1
1 0
2 3
3 54
4 3861
5 1028700
6 1067510583
7 4390552197234
8 72022439672173161
9 4721718122762915558520
10 1237892818862615769794806443
11 1298060597552993036455274183624814
12 5444502293926142814638982021027945429501
13 91343781554550362267223855965291602454111295060

List of values

[1, 0, 3, 54, 3861, 1028700, 1067510583, 4390552197234, 72022439672173161, 4721718122762915558520, 1237892818862615769794806443, 1298060597552993036455274183624814, 5444502293926142814638982021027945429501, 91343781554550362267223855965291602454111295060]

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

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