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 A189340 #8 Jun 06 2014 17:22:15 %S A189340 52,2704,140608,3988168,109746642,2650369322,68439605144, %T A189340 1732402041622,45288523287014,1169200527259744,30459419241960870, %U A189340 788089712516187485,20460101431991974234,529811400562012142385,13741195617567627797520 %N A189340 Number of n X 6 binary arrays without the pattern 1 0 0 1 diagonally, vertically, antidiagonally or horizontally. %C A189340 Column 6 of A189343. %H A189340 R. H. Hardin, <a href="/A189340/b189340.txt">Table of n, a(n) for n = 1..116</a> %e A189340 Some solutions for 4 X 6: %e A189340 ..0..0..0..1..1..0....0..0..0..0..1..0....0..0..0..0..1..0....0..0..1..1..0..1 %e A189340 ..0..0..1..0..0..0....0..0..1..1..1..1....0..0..0..1..0..1....0..0..0..1..1..0 %e A189340 ..0..1..1..1..0..1....0..1..1..1..0..1....0..0..1..1..0..1....0..1..1..1..0..1 %e A189340 ..0..0..0..1..0..1....0..0..0..1..1..0....0..1..0..0..0..1....0..0..0..1..0..0 %K A189340 nonn %O A189340 1,1 %A A189340 _R. H. Hardin_, Apr 20 2011