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 A231976 #6 Jul 23 2025 06:46:16 %S A231976 784,18225,741321,35366809,1557328369,69043343121,3036560660329, %T A231976 134086441384900,5933816403750361,262150807596195904, %U A231976 11579543313397076809,511643156104631950569,22607722308771420398449 %N A231976 Number of (n+1)X(7+1) 0..1 arrays with no element having a strict majority of its horizontal and vertical neighbors equal to one. %C A231976 Column 7 of A231977 %H A231976 R. H. Hardin, <a href="/A231976/b231976.txt">Table of n, a(n) for n = 1..210</a> %e A231976 Some solutions for n=2 %e A231976 ..0..0..0..0..1..0..0..0....0..0..0..0..1..0..0..0....1..0..0..0..1..0..0..0 %e A231976 ..1..1..0..0..1..0..0..1....0..0..0..0..1..0..1..0....0..0..0..0..1..0..0..0 %e A231976 ..0..0..0..0..0..0..0..0....0..0..1..0..0..0..0..0....0..1..1..0..0..0..0..1 %K A231976 nonn %O A231976 1,1 %A A231976 _R. H. Hardin_, Nov 16 2013