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.

A054918 Number of connected unlabeled digraphs with n nodes such that complement is also connected.

Table of values

n a(n)
1 1
2 1
3 10
4 180
5 9120
6 1520742
7 878908844
8 1791588717764
9 13024366540532952
10 341234368845828951004
11 32522226812040344643993088
12 11366680383641301437820379768750
13 14669062959091969068110415719779627436

List of values

[1, 1, 10, 180, 9120, 1520742, 878908844, 1791588717764, 13024366540532952, 341234368845828951004, 32522226812040344643993088, 11366680383641301437820379768750, 14669062959091969068110415719779627436]

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

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