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 A303037 #4 Apr 17 2018 13:21:37 %S A303037 8,31,56,234,703,2494,9882,38855,158630,674410,2921913,12955678, %T A303037 58544796,267600375,1235405800,5748447218,26880477835,126178539898, %U A303037 594019756766,2801839213779,13234169550602,62575594084426,296088878641741 %N A303037 Number of nX5 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 A303037 Column 5 of A303040. %H A303037 R. H. Hardin, <a href="/A303037/b303037.txt">Table of n, a(n) for n = 1..210</a> %e A303037 Some solutions for n=5 %e A303037 ..0..1..0..1..0. .0..0..0..1..0. .0..0..1..1..0. .0..1..0..1..0 %e A303037 ..1..0..0..1..0. .0..1..0..1..1. .0..1..0..1..0. .0..0..0..1..1 %e A303037 ..1..0..0..0..0. .0..1..0..1..0. .0..1..0..1..0. .1..1..1..1..1 %e A303037 ..1..1..0..1..0. .1..0..0..1..0. .1..1..0..0..0. .1..0..0..1..0 %e A303037 ..1..0..1..1..0. .1..0..1..0..0. .0..1..0..1..0. .1..0..1..0..0 %Y A303037 Cf. A303040. %K A303037 nonn %O A303037 1,1 %A A303037 _R. H. Hardin_, Apr 17 2018