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 A302813 #4 Apr 13 2018 13:12:46 %S A302813 64,8192,218640,7267160,232260380,7428713676,238687785290, %T A302813 7656052278093,245617324998434,7880802121694786,252845509516657378, %U A302813 8112313563916385380,260276854454728693116,8350749999160907426626,267926476583534501527483 %N A302813 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302813 Row 7 of A302808. %H A302813 R. H. Hardin, <a href="/A302813/b302813.txt">Table of n, a(n) for n = 1..210</a> %e A302813 Some solutions for n=5 %e A302813 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302813 ..0..0..1..1..0. .0..0..1..1..0. .0..0..1..1..0. .0..0..1..1..0 %e A302813 ..1..0..1..0..0. .1..0..1..0..0. .1..0..1..0..0. .1..0..1..0..0 %e A302813 ..1..0..1..0..1. .1..1..1..1..0. .1..1..1..0..1. .0..0..1..1..1 %e A302813 ..1..0..1..0..0. .1..0..0..1..1. .1..0..0..1..0. .1..1..0..0..0 %e A302813 ..1..1..0..1..1. .0..0..0..1..1. .0..0..1..1..0. .1..0..0..1..1 %e A302813 ..0..0..0..1..0. .1..0..1..1..0. .1..1..1..0..0. .1..1..0..0..1 %Y A302813 Cf. A302808. %K A302813 nonn %O A302813 1,1 %A A302813 _R. H. Hardin_, Apr 13 2018