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 A231769 #6 Jul 23 2025 06:41:42 %S A231769 169,14989,303601,5879679,175642009,5493044921,146247350929, %T A231769 3845043640849,106343160047524,2959935872860165,80906647779201721, %U A231769 2207482888632970065,60589305950560358400,1664210447596939433185 %N A231769 Number of (5+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one. %C A231769 Row 5 of A231764 %H A231769 R. H. Hardin, <a href="/A231769/b231769.txt">Table of n, a(n) for n = 1..210</a> %e A231769 Some solutions for n=2 %e A231769 ..1..0..0....0..0..0....0..0..1....1..0..0....1..1..0....0..1..0....1..1..0 %e A231769 ..0..0..1....0..0..1....0..0..0....0..0..0....0..0..0....0..0..0....1..0..0 %e A231769 ..0..0..1....0..0..0....0..1..0....0..0..0....0..0..0....0..0..0....1..0..0 %e A231769 ..0..0..1....1..1..0....0..0..1....0..0..0....1..0..0....0..0..0....0..0..1 %e A231769 ..0..1..0....0..0..0....0..0..0....0..1..1....0..0..1....0..0..0....0..1..1 %e A231769 ..1..0..0....0..0..0....0..0..1....0..0..1....0..1..0....0..0..1....0..0..0 %K A231769 nonn %O A231769 1,1 %A A231769 _R. H. Hardin_, Nov 13 2013