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 A302958 #4 Apr 16 2018 11:45:00 %S A302958 0,1172,164916,12365841,1212025201,130376252119,13578993819785, %T A302958 1403559107071889,145479455454006812,15089882967228651401, %U A302958 1564791955810116030473,162255388684026120105462 %N A302958 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302958 Row 7 of A302953. %H A302958 R. H. Hardin, <a href="/A302958/b302958.txt">Table of n, a(n) for n = 1..210</a> %e A302958 Some solutions for n=5 %e A302958 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302958 ..0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0 %e A302958 ..0..0..1..1..0. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..0 %e A302958 ..0..0..0..0..0. .0..0..1..0..0. .0..0..0..0..0. .0..0..0..0..1 %e A302958 ..0..1..0..0..0. .1..1..1..1..1. .0..1..1..0..0. .0..1..0..0..0 %e A302958 ..0..0..1..1..0. .0..1..1..0..1. .1..0..1..0..1. .1..1..1..0..0 %e A302958 ..1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..1. .1..1..0..1..1 %Y A302958 Cf. A302953. %K A302958 nonn %O A302958 1,2 %A A302958 _R. H. Hardin_, Apr 16 2018