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 A302073 #4 Mar 31 2018 15:48:05 %S A302073 32,2048,31760,636852,12063625,230634314,4418931065,84488922112, %T A302073 1616938426482,30932061148349,591839309608541,11324992647651763, %U A302073 216720956926608684,4147396167934309138,79369479396301029533 %N A302073 Number of 6Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A302073 Row 6 of A302069. %H A302073 R. H. Hardin, <a href="/A302073/b302073.txt">Table of n, a(n) for n = 1..210</a> %e A302073 Some solutions for n=5 %e A302073 ..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0 %e A302073 ..1..1..1..0..1. .1..1..0..0..1. .1..1..1..1..0. .1..1..1..0..1 %e A302073 ..0..1..1..0..1. .0..1..0..0..1. .0..0..0..0..0. .0..1..0..0..1 %e A302073 ..0..0..1..0..1. .0..1..1..0..0. .1..1..0..1..1. .0..1..0..0..1 %e A302073 ..1..0..1..0..0. .0..0..1..0..0. .1..0..0..0..1. .0..1..1..0..0 %e A302073 ..0..0..1..0..1. .1..0..1..0..0. .1..1..0..1..0. .1..0..1..0..1 %Y A302073 Cf. A302069. %K A302073 nonn %O A302073 1,1 %A A302073 _R. H. Hardin_, Mar 31 2018