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 A231585 #6 Jul 23 2025 06:35:31 %S A231585 422,12922,5618444,1453028265,260228939106,63676872069694, %T A231585 16297132727558385,3833026928529265733,899070341715148291141, %U A231585 216695260231841309307295,52101389603112220215510578 %N A231585 Number of nX6 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors. %C A231585 Column 6 of A231586 %H A231585 R. H. Hardin, <a href="/A231585/b231585.txt">Table of n, a(n) for n = 1..19</a> %e A231585 Some solutions for n=2 %e A231585 ..1..0..0..0..0..3....2..0..0..0..0..0....0..0..2..1..1..2....3..0..0..3..1..1 %e A231585 ..0..0..1..0..0..3....0..0..1..2..0..0....0..0..1..1..1..2....2..0..0..1..1..1 %K A231585 nonn %O A231585 1,1 %A A231585 _R. H. Hardin_, Nov 11 2013