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 A303627 #4 Apr 27 2018 09:57:48 %S A303627 16,6,616,1870,37910,350410,5249045,70522741,1042683911,15412143256, %T A303627 231857391297,3507294376595,53265758197769,810914386664759, %U A303627 12360167854003888,188554666107041773,2877613349788302762 %N A303627 Number of 5Xn 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303627 Row 5 of A303624. %H A303627 R. H. Hardin, <a href="/A303627/b303627.txt">Table of n, a(n) for n = 1..210</a> %e A303627 Some solutions for n=5 %e A303627 ..0..0..0..1..1. .0..1..1..1..0. .0..0..0..1..1. .0..0..0..0..1 %e A303627 ..0..0..1..1..0. .1..1..1..1..1. .1..0..0..1..1. .0..0..1..0..0 %e A303627 ..1..1..1..1..1. .0..0..1..0..0. .1..0..1..1..1. .1..1..0..1..1 %e A303627 ..0..1..0..0..0. .1..0..0..0..1. .0..0..0..1..1. .0..1..1..1..0 %e A303627 ..0..1..0..0..1. .0..0..1..0..0. .1..0..1..1..1. .1..1..0..1..1 %Y A303627 Cf. A303624. %K A303627 nonn %O A303627 1,1 %A A303627 _R. H. Hardin_, Apr 27 2018