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 A302957 #4 Apr 16 2018 11:44:19 %S A302957 0,361,25131,998670,50519822,2766909379,147310312318,7792601909575, %T A302957 413221140108695,21925142145040301,1163067389442877369, %U A302957 61694202460260635301,3272597655031259362393,173597299390133576071391 %N A302957 Number of 6Xn 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 A302957 Row 6 of A302953. %H A302957 R. H. Hardin, <a href="/A302957/b302957.txt">Table of n, a(n) for n = 1..210</a> %e A302957 Some solutions for n=5 %e A302957 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302957 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..0. .0..0..0..1..0 %e A302957 ..0..1..1..0..1. .0..1..1..1..0. .0..0..1..0..0. .0..1..1..0..0 %e A302957 ..0..0..0..1..1. .0..1..1..0..1. .1..1..0..1..1. .1..1..0..1..0 %e A302957 ..1..0..0..0..1. .1..0..1..0..1. .1..1..1..0..0. .1..1..0..0..0 %e A302957 ..0..1..1..0..0. .0..0..1..1..0. .1..1..0..1..0. .1..0..1..1..0 %Y A302957 Cf. A302953. %K A302957 nonn %O A302957 1,2 %A A302957 _R. H. Hardin_, Apr 16 2018