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 A189158 #7 Jul 22 2025 11:35:03 %S A189158 52,2704,140608,4597967,151889331,4708773306,139543984265, %T A189158 4101554902927,118889716429242,3425594682105277,98397912139545475, %U A189158 2819403207915017394,80693441112166000473,2307804705252673221664,65972623009915917276895 %N A189158 Number of nX6 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally. %C A189158 Column 6 of A189161 %H A189158 R. H. Hardin, <a href="/A189158/b189158.txt">Table of n, a(n) for n = 1..200</a> %e A189158 Some solutions for 4X6 %e A189158 ..0..1..1..1..1..1....0..0..1..0..0..0....0..0..0..1..0..1....0..1..1..1..1..1 %e A189158 ..0..0..0..1..0..0....0..1..0..0..0..1....0..0..1..0..0..0....0..0..0..0..1..0 %e A189158 ..0..1..0..1..1..1....0..1..0..0..1..0....0..0..0..0..0..1....0..0..0..1..0..0 %e A189158 ..0..0..1..0..1..0....0..1..1..0..0..0....0..1..1..1..0..0....0..1..0..1..0..0 %K A189158 nonn %O A189158 1,1 %A A189158 _R. H. Hardin_ Apr 17 2011