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 A232130 #7 Jul 23 2025 06:53:38 %S A232130 6,728,602468,3795674252,176569302110496,60960050569112225624, %T A232130 156025607439258576501944264,2960693161885750577087228146201160, %U A232130 416501345588614541672537137056124519706624 %N A232130 Number of (n+1)X(n+1) 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order. %C A232130 Diagonal of A232137 %H A232130 R. H. Hardin, <a href="/A232130/b232130.txt">Table of n, a(n) for n = 1..10</a> %e A232130 Some solutions for n=2 %e A232130 ..0..1..2....0..1..2....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0 %e A232130 ..0..1..2....2..1..0....2..1..0....2..0..2....0..1..1....2..2..0....2..0..1 %e A232130 ..2..1..2....1..0..1....0..1..2....0..1..2....0..0..2....2..0..2....1..2..0 %K A232130 nonn %O A232130 1,1 %A A232130 _R. H. Hardin_, Nov 19 2013