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 A303087 #4 Apr 18 2018 12:23:32 %S A303087 16,6,416,304,11767,34430,636070,4585419,60170515,624887953, %T A303087 7591519361,87577958854,1051143716702,12466186847080,149433683446612, %U A303087 1785840844823381,21408005102663193,256419078046090099 %N A303087 Number of 5Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303087 Row 5 of A303084. %H A303087 R. H. Hardin, <a href="/A303087/b303087.txt">Table of n, a(n) for n = 1..210</a> %e A303087 Some solutions for n=5 %e A303087 ..0..1..0..0..1. .0..1..0..0..1. .0..1..1..1..0. .0..0..1..1..1 %e A303087 ..0..1..0..0..1. .0..1..0..0..1. .1..1..1..1..0. .1..0..0..1..1 %e A303087 ..1..1..1..0..1. .1..1..1..0..0. .0..1..0..1..0. .0..0..1..0..0 %e A303087 ..0..1..1..0..0. .1..1..1..0..1. .1..1..0..1..1. .1..1..0..0..0 %e A303087 ..1..1..0..0..0. .0..1..0..0..0. .1..1..1..1..1. .0..1..1..0..1 %Y A303087 Cf. A303084. %K A303087 nonn %O A303087 1,1 %A A303087 _R. H. Hardin_, Apr 18 2018