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 A189159 #7 Jul 22 2025 11:35:10 %S A189159 96,9216,884736,48460966,2710884810,139543984265,6787471566616, %T A189159 327166323321331,15463232072168424,725494470365730502, %U A189159 33890063050246876236,1577540791665774040985,73320840584238660162738 %N A189159 Number of nX7 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally. %C A189159 Column 7 of A189161 %H A189159 R. H. Hardin, <a href="/A189159/b189159.txt">Table of n, a(n) for n = 1..145</a> %e A189159 Some solutions for 4X7 %e A189159 ..0..0..0..0..0..0..1....0..0..1..0..1..1..1....0..0..1..0..0..0..1 %e A189159 ..0..0..0..1..0..0..0....0..0..1..0..1..0..0....0..0..1..0..1..0..0 %e A189159 ..0..0..0..0..1..0..0....0..0..0..0..1..0..1....0..0..0..0..1..0..1 %e A189159 ..0..0..0..1..0..0..0....0..1..1..0..1..0..0....0..0..1..0..0..0..1 %K A189159 nonn %O A189159 1,1 %A A189159 _R. H. Hardin_ Apr 17 2011