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 A189339 #7 Jul 22 2025 11:43:00 %S A189339 28,784,21952,390721,6814820,109746642,1857004061,31177656076, %T A189339 533269057178,9053472938552,154252966185542,2618674812680579, %U A189339 44520074517291894,756141322418868556,12851400623635035810 %N A189339 Number of nX5 binary arrays without the pattern 1 0 0 1 diagonally, vertically, antidiagonally or horizontally. %C A189339 Column 5 of A189343 %H A189339 R. H. Hardin, <a href="/A189339/b189339.txt">Table of n, a(n) for n = 1..200</a> %e A189339 Some solutions for 4X5 %e A189339 ..0..0..1..0..0....0..1..1..0..1....0..0..1..1..0....0..0..0..0..0 %e A189339 ..0..1..0..1..0....0..0..0..1..1....0..1..1..1..1....0..1..1..1..0 %e A189339 ..1..0..1..1..0....0..0..1..1..1....0..0..0..0..1....0..0..0..1..0 %e A189339 ..0..0..1..0..1....0..0..1..0..1....1..0..1..0..0....0..1..1..0..1 %K A189339 nonn %O A189339 1,1 %A A189339 _R. H. Hardin_ Apr 20 2011