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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.

A308128 Isomorphism classes of connected Eulerian digraphs with n vertices, allowing loops.

Table of values

n a(n)
0 1
1 2
2 3
3 14
4 112
5 2174
6 124501
7 22400498
8 13010949171
9 24926846389076
10 160810397320789069
11 3554744065897655673978
12 273140190737719436311559660
13 73831786956788218320014098284918
14 70920392983384812245087697080226658475
15 244186402549448674084991238687021028510453186

List of values

[1, 2, 3, 14, 112, 2174, 124501, 22400498, 13010949171, 24926846389076, 160810397320789069, 3554744065897655673978, 273140190737719436311559660, 73831786956788218320014098284918, 70920392983384812245087697080226658475, 244186402549448674084991238687021028510453186]

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

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