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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.

A139623 Table read by rows: T(n,k) is the number of directed multigraphs with loops and no vertex of degree 0, with n arcs and k vertices, which are transitive (the existence of a path between two points implies the existence of an arc between those two points).

Table of values

n a(n)
1 1
2 1
3 1
4 4
5 3
6 1
7 1
8 7
9 12
10 9
11 3
12 1
13 1
14 13

List of values

[1, 1, 1, 4, 3, 1, 1, 7, 12, 9, 3, 1, 1, 13]

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

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