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 A303629 #4 Apr 27 2018 09:59:08 %S A303629 64,21,10288,62207,4288358,122517773,6323564388,290118140045, %T A303629 14717695448165,745702210079702,38382642404113793,1985085140054551129, %U A303629 102986990515395922403,5353920883901539271717,278582161093558674832024 %N A303629 Number of 7Xn 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 A303629 Row 7 of A303624. %H A303629 R. H. Hardin, <a href="/A303629/b303629.txt">Table of n, a(n) for n = 1..210</a> %e A303629 Some solutions for n=5 %e A303629 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A303629 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A303629 ..0..1..0..1..0. .0..0..0..0..0. .1..1..0..1..0. .0..0..1..1..1 %e A303629 ..0..0..0..0..0. .0..0..1..0..0. .1..1..0..0..0. .1..1..1..1..0 %e A303629 ..0..0..1..0..0. .1..1..0..1..1. .1..0..1..0..1. .1..1..0..1..0 %e A303629 ..0..0..1..0..0. .1..1..1..1..0. .1..1..0..0..1. .0..1..1..1..1 %e A303629 ..0..0..1..0..0. .1..1..1..1..1. .0..1..1..0..0. .1..1..0..1..1 %Y A303629 Cf. A303624. %K A303629 nonn %O A303629 1,1 %A A303629 _R. H. Hardin_, Apr 27 2018