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.

A229409 Number of nX5 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

Table of values

n a(n)
1 819
2 199595
3 49788258
4 12462062342
5 3113479414050
6 777638567093963
7 194334416016079648
8 48554820719187209670
9 12132494321992628909959
10 3031488710689140016181815
11 757470261215571296326841223

List of values

[819, 199595, 49788258, 12462062342, 3113479414050, 777638567093963, 194334416016079648, 48554820719187209670, 12132494321992628909959, 3031488710689140016181815, 757470261215571296326841223]

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

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