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 A302373 #4 Apr 06 2018 12:26:29 %S A302373 64,21,5110,3143,367512,3858625,188443738,4558781926,165780766701, %T A302373 5415891438878,189247523369764,6553114775753702,229298263096647662, %U A302373 8027176450120824795,281624648305633428630,9882003741109888621778 %N A302373 Number of 7Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302373 Row 7 of A302367. %H A302373 R. H. Hardin, <a href="/A302373/b302373.txt">Table of n, a(n) for n = 1..210</a> %e A302373 Some solutions for n=5 %e A302373 ..0..0..0..1..1. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..1..0 %e A302373 ..1..0..0..1..1. .1..0..1..1..0. .0..0..1..1..1. .1..0..0..1..0 %e A302373 ..0..0..1..1..1. .0..0..0..1..0. .1..0..0..1..1. .0..0..1..1..1 %e A302373 ..0..0..1..1..0. .1..0..1..1..1. .0..0..1..0..0. .1..0..0..1..1 %e A302373 ..1..1..0..1..1. .0..0..0..1..0. .1..1..0..0..1. .1..0..0..0..1 %e A302373 ..0..1..0..0..0. .0..0..0..1..0. .1..1..0..0..1. .0..0..1..1..1 %e A302373 ..1..1..1..0..0. .1..0..1..1..1. .1..1..1..0..0. .0..0..0..1..0 %Y A302373 Cf. A302367. %K A302373 nonn %O A302373 1,1 %A A302373 _R. H. Hardin_, Apr 06 2018