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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.

A308111 Isomorphism classes of Eulerian digraphs with n vertices, allowing loops.

Table of values

n a(n)
0 1
1 2
2 6
3 24
4 160
5 2512
6 129816
7 22665792
8 13056562208
9 24953006054144
10 160860329639968800
11 3555065836569542246400
12 273147301191314006316868352
13 73832333258502021627712839197696
14 70920540648597652305602460997787710080
15 244186544390677638132290202415190606165938176
16 3036252267734950687777830287721323374283100639476736

List of values

[1, 2, 6, 24, 160, 2512, 129816, 22665792, 13056562208, 24953006054144, 160860329639968800, 3555065836569542246400, 273147301191314006316868352, 73832333258502021627712839197696, 70920540648597652305602460997787710080, 244186544390677638132290202415190606165938176, 3036252267734950687777830287721323374283100639476736]

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

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