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 A231644 #7 Jul 23 2025 06:35:47 %S A231644 3,35,920,137961,96014413,374409597564,7673178325424236, %T A231644 823755531731133088630,468550736330699430524865279 %N A231644 Number of n X n 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors. %C A231644 Diagonal of A231651 %e A231644 Some solutions for n=3 %e A231644 ..0..0..0....0..2..1....1..1..2....0..0..1....0..2..0....2..0..0....0..0..0 %e A231644 ..0..0..2....0..1..1....0..0..1....2..0..1....0..0..0....1..0..0....0..2..1 %e A231644 ..1..1..1....0..1..1....0..0..1....1..0..0....0..0..2....1..2..2....0..0..0 %K A231644 nonn %O A231644 1,1 %A A231644 _R. H. Hardin_, Nov 12 2013