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 A231751 #6 Jul 23 2025 06:40:07 %S A231751 121,2485,397219,36596191,2966010838,309458955366,31638510266609, %T A231751 3041193156650724,296576264769131499,29380275874994459363, %U A231751 2892477394704091137503,283798285900590449754004 %N A231751 Number of nX6 0..2 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors. %C A231751 Column 6 of A231753 %H A231751 R. H. Hardin, <a href="/A231751/b231751.txt">Table of n, a(n) for n = 1..149</a> %e A231751 Some solutions for n=2 %e A231751 ..2..0..2..0..0..0....0..0..0..0..0..0....1..1..1..2..1..2....0..0..1..0..0..2 %e A231751 ..0..0..0..1..0..1....0..2..0..0..2..0....2..1..1..1..1..1....2..0..0..0..0..0 %K A231751 nonn %O A231751 1,1 %A A231751 _R. H. Hardin_, Nov 13 2013