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 A303622 #4 Apr 27 2018 09:54:18 %S A303622 1,168,1283,19467,350410,6446485,122517773,2348299355,45211204167, %T A303622 872116776878,16840012914187,325325036804019,6286301532328358, %U A303622 121485138860397708,2347880112852680240,45377538348278054960 %N A303622 Number of nX6 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303622 Column 6 of A303624. %H A303622 R. H. Hardin, <a href="/A303622/b303622.txt">Table of n, a(n) for n = 1..210</a> %e A303622 Some solutions for n=5 %e A303622 ..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..1..1..0..0 %e A303622 ..0..0..0..1..0..0. .0..0..1..1..0..0. .0..0..0..0..1..1. .0..0..1..1..0..0 %e A303622 ..0..1..0..0..0..0. .0..0..1..1..0..0. .0..0..0..1..1..1. .1..0..0..1..0..0 %e A303622 ..0..0..0..1..0..1. .1..0..0..1..1..1. .0..0..0..0..1..0. .0..0..0..1..1..1 %e A303622 ..1..0..0..1..0..1. .1..0..0..1..1..0. .1..0..0..0..1..0. .0..0..0..1..1..1 %Y A303622 Cf. A303624. %K A303622 nonn %O A303622 1,2 %A A303622 _R. H. Hardin_, Apr 27 2018