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.
%I A239534 #6 Jul 23 2025 11:00:03 %S A239534 44,44,11616,131988,7199001,165336096,5988724293,169350916116, %T A239534 5466853947751,164296850179323,5131131032053999,156962544055183204, %U A239534 4855406401541918053,149293998662009764711,4605398637091088559654 %N A239534 Number of (n+1)X(5+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order. %C A239534 Column 5 of A239537 %H A239534 R. H. Hardin, <a href="/A239534/b239534.txt">Table of n, a(n) for n = 1..87</a> %e A239534 Some solutions for n=3 %e A239534 ..0..1..0..2..1..0....0..1..2..1..1..2....0..1..1..0..0..1....0..1..2..0..2..1 %e A239534 ..0..1..0..2..1..0....0..1..2..1..1..2....0..1..1..0..0..1....0..1..2..0..2..1 %e A239534 ..1..2..1..2..0..1....2..0..2..1..1..0....0..1..1..2..2..0....2..0..0..2..0..2 %e A239534 ..1..2..1..2..0..1....2..0..2..1..1..0....0..1..1..2..2..0....2..0..0..2..0..2 %K A239534 nonn %O A239534 1,1 %A A239534 _R. H. Hardin_, Mar 21 2014