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 A302746 #4 Apr 12 2018 11:25:41 %S A302746 64,8192,630604,50347423,4104946296,336148647504,27552364197684, %T A302746 2259775666820199,185346624306819175,15203212791707362697, %U A302746 1247058011926331112543,102291835163573811251710 %N A302746 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302746 Row 7 of A302741. %H A302746 R. H. Hardin, <a href="/A302746/b302746.txt">Table of n, a(n) for n = 1..210</a> %e A302746 Some solutions for n=5 %e A302746 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302746 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302746 ..1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1 %e A302746 ..0..0..0..1..1. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..1 %e A302746 ..1..0..1..0..0. .0..1..0..1..1. .1..1..0..1..1. .1..0..0..1..0 %e A302746 ..0..0..1..0..0. .0..1..0..0..1. .0..0..1..0..1. .0..1..1..0..0 %e A302746 ..0..1..0..1..0. .1..1..1..1..1. .0..0..0..0..1. .1..1..0..1..1 %Y A302746 Cf. A302741. %K A302746 nonn %O A302746 1,1 %A A302746 _R. H. Hardin_, Apr 12 2018