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.

A207340 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.

Table of values

n a(n)
1 2
2 16
3 84
4 828
5 9668
6 128292
7 2367656
8 53882188
9 1466226618
10 53206438448
11 2394759800657
12 133358534841765
13 9689628432751700
14 882639945891070144
15 101352502023903785258
16 15016562984066207345796
17 2813722789748877650099592

List of values

[2, 16, 84, 828, 9668, 128292, 2367656, 53882188, 1466226618, 53206438448, 2394759800657, 133358534841765, 9689628432751700, 882639945891070144, 101352502023903785258, 15016562984066207345796, 2813722789748877650099592]

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

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