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 A241117 #6 Jul 23 2025 11:10:38 %S A241117 51,40148,35000157,30679522712,26891788727245,23571710809729613, %T A241117 20661533160923240569,18110647865626429410574, %U A241117 15874696395915702411853835,13914796838668264590028175362,12196867658593859651556394012550 %N A241117 Number of nX5 0..3 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..3 introduced in row major order. %C A241117 Column 5 of A241119 %H A241117 R. H. Hardin, <a href="/A241117/b241117.txt">Table of n, a(n) for n = 1..143</a> %e A241117 Some solutions for n=2 %e A241117 ..0..1..2..3..3....0..0..0..0..1....0..1..2..0..0....0..1..2..1..0 %e A241117 ..1..2..0..3..3....1..2..2..2..1....1..3..3..0..1....2..0..0..0..1 %K A241117 nonn %O A241117 1,1 %A A241117 _R. H. Hardin_, Apr 16 2014