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.

A054948 Number of labeled semi-strong digraphs on n nodes.

Table of values

n a(n)
0 1
1 1
2 2
3 22
4 1688
5 573496
6 738218192
7 3528260038192
8 63547436065854848
9 4400982906402148836736
10 1190477715153930158152163072
11 1270476960212865235273469079407872
12 5381083212549793228422395071641588743168
13 90765858793484859057065439213726376149311958016

List of values

[1, 1, 2, 22, 1688, 573496, 738218192, 3528260038192, 63547436065854848, 4400982906402148836736, 1190477715153930158152163072, 1270476960212865235273469079407872, 5381083212549793228422395071641588743168, 90765858793484859057065439213726376149311958016]

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

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