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.

A054920 Number of connected unlabeled reflexive relations with n nodes such that complement is also connected.

Table of values

n a(n)
1 2
2 4
3 68
4 2592
5 278796
6 95720106
7 111891292036
8 457846756500066
9 6664787020904248568
10 349363873490889302878250
11 66602024342830108271942323060
12 46557190064705399729526041154647820

List of values

[2, 4, 68, 2592, 278796, 95720106, 111891292036, 457846756500066, 6664787020904248568, 349363873490889302878250, 66602024342830108271942323060, 46557190064705399729526041154647820]

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

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