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 A231316 #6 Jul 23 2025 06:24:13 %S A231316 6,432,569184,4509951264,277024322215296,124848872383160454816, %T A231316 418284029768568825937161600,10384840669528137933211181787934080, %U A231316 1911676181020982254709223663612649499528544 %N A231316 Number of (n+1)X(n+1) 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order. %C A231316 Diagonal of A231324 %e A231316 Some solutions for n=2 %e A231316 ..0..1..1....0..0..1....0..1..1....0..1..1....0..1..1....0..1..2....0..1..0 %e A231316 ..0..2..0....2..2..0....2..2..1....1..2..2....2..2..1....2..1..2....0..2..1 %e A231316 ..0..2..0....0..2..0....0..0..1....0..2..0....1..2..0....0..0..2....1..0..1 %K A231316 nonn %O A231316 1,1 %A A231316 _R. H. Hardin_, Nov 07 2013