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 A188743 #7 Jul 22 2025 11:20:10 %S A188743 32,1024,10327,184411,3283906,50067824,828466161,13666030547, %T A188743 221062541460,3615827505717,59094131400635,963450629620601, %U A188743 15731137751927915,256815197782250586,4191335618980407425 %N A188743 Number of nX5 binary arrays without the pattern 1 1 1 diagonally, vertically or antidiagonally. %C A188743 Column 5 of A188747 %H A188743 R. H. Hardin, <a href="/A188743/b188743.txt">Table of n, a(n) for n = 1..200</a> %e A188743 Some solutions for 3X5 %e A188743 ..1..1..1..1..0....1..0..0..1..1....0..0..0..0..0....0..1..0..0..0 %e A188743 ..0..0..0..0..1....0..1..0..1..0....1..0..0..1..1....1..0..0..1..0 %e A188743 ..1..0..1..0..0....1..0..0..0..0....1..0..0..0..1....0..1..1..0..0 %K A188743 nonn %O A188743 1,1 %A A188743 _R. H. Hardin_ Apr 09 2011