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 A232142 #6 Jul 23 2025 06:54:40 %S A232142 18272,6056640,1825568436,568008109436,176569302110496, %T A232142 54960219182423136,17107853745211295232,5325678820913538275524, %U A232142 1657890273072455653181040,516105170304715030150601160,160664786921134786859505283136 %N A232142 Number of (5+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 A232142 Row 5 of A232137 %H A232142 R. H. Hardin, <a href="/A232142/b232142.txt">Table of n, a(n) for n = 1..210</a> %e A232142 Some solutions for n=1 %e A232142 ..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1 %e A232142 ..1..2....1..2....2..2....0..2....2..2....2..1....1..0....2..2....0..1....2..2 %e A232142 ..2..0....1..0....1..2....0..0....0..0....2..0....1..0....1..2....1..0....1..0 %e A232142 ..1..0....1..1....0..0....2..0....1..1....1..2....0..2....0..1....1..0....2..1 %e A232142 ..0..1....2..2....1..2....2..1....0..1....0..2....0..1....1..0....0..1....2..2 %e A232142 ..2..1....1..2....2..0....1..2....0..1....2..0....2..1....2..0....0..1....0..2 %K A232142 nonn %O A232142 1,1 %A A232142 _R. H. Hardin_, Nov 19 2013