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 A303044 #4 Apr 17 2018 13:26:29 %S A303044 32,42,186,544,2494,13597,59654,251705,1186522,5869222,27381443, %T A303044 126165687,604239638,2948606295,14144665365,67469024030,326726182958, %U A303044 1595597953024,7746571268500,37522290645262,182886057727441 %N A303044 Number of 6Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303044 Row 6 of A303040. %H A303044 R. H. Hardin, <a href="/A303044/b303044.txt">Table of n, a(n) for n = 1..210</a> %e A303044 Some solutions for n=5 %e A303044 ..0..1..0..1..0. .0..1..0..1..0. .0..1..1..1..0. .0..0..0..1..0 %e A303044 ..0..1..0..0..0. .0..1..1..1..0. .1..1..1..1..1. .0..1..0..1..0 %e A303044 ..1..1..0..1..0. .0..1..0..1..0. .0..1..1..1..0. .0..1..0..1..1 %e A303044 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0 %e A303044 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0 %e A303044 ..0..1..1..0..0. .0..1..0..1..0. .0..1..0..0..1. .0..0..1..1..0 %Y A303044 Cf. A303040. %K A303044 nonn %O A303044 1,1 %A A303044 _R. H. Hardin_, Apr 17 2018