cp's OEIS Frontend

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.

A139630 Row sums of A139625, number of strongly connected directed multigraphs with loops and no vertex of degree 0, with n arcs, 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)
0 1
1 1
2 1
3 1
4 2
5 3
6 7
7 11
8 20
9 30
10 47
11 71
12 117
13 201
14 369
15 703
16 1323
17 2463
18 4446

List of values

[1, 1, 1, 1, 2, 3, 7, 11, 20, 30, 47, 71, 117, 201, 369, 703, 1323, 2463, 4446]

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

Content is available under The OEIS End-User License Agreement.