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 A231226 #6 Jul 23 2025 06:19:31 %S A231226 43,264,1799,12179,102113,748665,5930126,48317804,390225796, %T A231226 3267809753,27184285056,228686827731,1938757497433,16432432134267, %U A231226 140079591842774,1195812427594821,10221439423090293,87552309666153978,750295493573918472 %N A231226 Number of (n+2)X(7+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order. %C A231226 Column 7 of A231227 %H A231226 R. H. Hardin, <a href="/A231226/b231226.txt">Table of n, a(n) for n = 1..31</a> %e A231226 Some solutions for n=3 %e A231226 ..0..0..1..1..1..1..1..0..0....0..0..0..0..0..0..1..1..1 %e A231226 ..0..0..1..1..1..1..1..0..0....0..0..0..0..0..0..1..1..1 %e A231226 ..0..0..1..1..1..1..1..0..0....2..2..0..0..0..0..1..1..1 %e A231226 ..1..1..0..0..1..1..0..0..0....2..2..2..0..0..0..1..1..1 %e A231226 ..1..1..0..0..0..0..0..0..0....2..2..2..0..0..0..1..1..1 %K A231226 nonn %O A231226 1,1 %A A231226 _R. H. Hardin_, Nov 05 2013