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 A222141 #6 Jul 23 2025 02:24:45 %S A222141 256,114244,50999956,22767656980,10164078082036,4537511642094436, %T A222141 2025664524518719732,904309916809657591444,403707729455406641892052, %U A222141 180225747607432250658675940,80457513519867024627155058004 %N A222141 Number of nX5 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero. %C A222141 Column 5 of A222144 %H A222141 R. H. Hardin, <a href="/A222141/b222141.txt">Table of n, a(n) for n = 1..210</a> %F A222141 Empirical: a(n) = 542*a(n-1) -45648*a(n-2) +1362782*a(n-3) -14182035*a(n-4) -10420216*a(n-5) +672452128*a(n-6) -1495546560*a(n-7) %e A222141 Some solutions for n=3 %e A222141 ..0..1..4..4..0....0..0..1..3..0....0..0..0..0..0....0..1..3..3..0 %e A222141 ..0..1..4..4..1....0..1..2..4..0....0..1..1..1..1....0..2..4..4..1 %e A222141 ..0..1..4..2..4....0..1..2..2..2....0..1..1..3..1....0..0..0..1..3 %K A222141 nonn %O A222141 1,1 %A A222141 _R. H. Hardin_ Feb 09 2013