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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.

A054933 Number of unlabeled digraphs on n nodes up to reversing the arcs.

Table of values

n a(n)
1 1
2 3
3 13
4 144
5 5158
6 778084
7 441288796
8 896699384640
9 6513980949408584
10 170630216624502796000
11 16261454692830032538976880
12 5683372715412978313604073582912
13 7334542846356465411966209047539403296
14 35157828307617499762304829312302735958971072
15 629172630775224433640531447950565255471723325434560

List of values

[1, 3, 13, 144, 5158, 778084, 441288796, 896699384640, 6513980949408584, 170630216624502796000, 16261454692830032538976880, 5683372715412978313604073582912, 7334542846356465411966209047539403296, 35157828307617499762304829312302735958971072, 629172630775224433640531447950565255471723325434560]

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

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