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 A231393 #6 Jul 23 2025 06:27:19 %S A231393 78,363,1706,8340,41237,217846,1158551,6261166,34110556,186830745, %T A231393 1027023009,5657597268,31213417616,172357775732,952325314496, %U A231393 5263831652451,29102221456013,160923210164607,889929539183295 %N A231393 Number of (n+1)X(5+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order. %C A231393 Column 5 of A231396 %H A231393 R. H. Hardin, <a href="/A231393/b231393.txt">Table of n, a(n) for n = 1..210</a> %e A231393 Some solutions for n=5 %e A231393 ..0..0..0..0..1..1....0..0..0..0..0..0....0..1..1..1..1..0....0..1..0..1..1..1 %e A231393 ..0..0..0..0..0..1....0..0..0..0..1..1....0..0..1..1..0..0....1..0..1..0..0..0 %e A231393 ..2..2..0..0..1..1....0..0..1..1..1..1....0..0..1..1..0..0....0..1..0..0..0..0 %e A231393 ..2..2..2..1..1..1....0..1..1..1..1..1....0..0..0..1..1..0....1..0..0..0..0..0 %e A231393 ..2..2..2..1..1..1....0..0..1..1..1..1....0..0..1..0..0..1....0..1..0..0..0..0 %e A231393 ..2..2..1..1..1..1....0..0..0..1..1..1....1..1..0..1..1..0....1..0..1..1..1..1 %K A231393 nonn %O A231393 1,1 %A A231393 _R. H. Hardin_, Nov 08 2013