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 A231939 #6 Jul 23 2025 06:44:16 %S A231939 422,326010,94464137,35573826030,11290398059577,3476929567859638, %T A231939 1120087651967672493,362364211977717231282,115930516058476641150973, %U A231939 37079126047622440334424980,11892185139285339771154279190 %N A231939 Number of nX6 0..3 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. %C A231939 Column 6 of A231940 %H A231939 R. H. Hardin, <a href="/A231939/b231939.txt">Table of n, a(n) for n = 1..34</a> %e A231939 Some solutions for n=2 %e A231939 ..0..0..1..3..0..0....0..0..2..0..0..0....0..0..2..0..1..2....0..0..1..2..2..2 %e A231939 ..0..0..2..3..1..0....0..2..0..0..2..3....3..0..0..0..0..2....0..0..2..3..3..2 %K A231939 nonn %O A231939 1,1 %A A231939 _R. H. Hardin_, Nov 15 2013