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.

A190535 Number of (n+2) X (n+2) symmetric binary matrices without the pattern 0 1 1 diagonally.

Table of values

n a(n)
1 56
2 672
3 13440
4 443520
5 23950080
6 2107607040
7 301387806720
8 69921971159040
9 26290661155799040
10 16011012643881615360
11 15786858466867272744960
12 25195826113120167300956160
13 65080818850189392138369761280

List of values

[56, 672, 13440, 443520, 23950080, 2107607040, 301387806720, 69921971159040, 26290661155799040, 16011012643881615360, 15786858466867272744960, 25195826113120167300956160, 65080818850189392138369761280]

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

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