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 A303202 #4 Apr 19 2018 13:42:24 %S A303202 64,86,305,1357,5573,32223,164295,791150,3806973,20061588,102569116, %T A303202 509264634,2533233396,13009655163,66295486978,333341116143, %U A303202 1676598847494,8537179144591,43394714360416,219303340502779,1108007577865676 %N A303202 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303202 Row 7 of A303197. %H A303202 R. H. Hardin, <a href="/A303202/b303202.txt">Table of n, a(n) for n = 1..210</a> %e A303202 Some solutions for n=5 %e A303202 ..0..1..1..0..1. .0..1..0..1..0. .0..1..0..1..0. .0..1..1..0..1 %e A303202 ..1..1..1..1..0. .1..1..0..0..0. .1..1..0..1..1. .1..1..1..1..0 %e A303202 ..1..1..1..1..1. .0..1..0..1..0. .0..1..0..1..0. .1..1..1..1..1 %e A303202 ..0..1..1..1..1. .0..1..0..1..1. .0..1..0..1..0. .1..1..1..1..1 %e A303202 ..0..1..0..1..1. .0..1..0..1..0. .1..1..0..0..0. .0..1..1..1..1 %e A303202 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .1..0..1..1..0 %e A303202 ..1..0..0..1..0. .0..1..0..0..1. .0..1..0..1..0. .1..0..1..0..1 %Y A303202 Cf. A303197. %K A303202 nonn %O A303202 1,1 %A A303202 _R. H. Hardin_, Apr 19 2018