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 A302210 #4 Apr 03 2018 12:00:29 %S A302210 1,65,22,80,281,1395,8756,43128,234170,1294490,7086959,38970702, %T A302210 215045749,1186180072,6546201483,36141119314,199545542832, %U A302210 1101845565725,6084429873748,33599148008180,185542430499264,1024617396401798 %N A302210 Number of nX6 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302210 Column 6 of A302212. %H A302210 R. H. Hardin, <a href="/A302210/b302210.txt">Table of n, a(n) for n = 1..210</a> %e A302210 Some solutions for n=5 %e A302210 ..0..1..1..1..1..0. .0..0..1..0..0..0. .0..1..1..0..0..1. .0..1..1..1..1..0 %e A302210 ..1..1..0..0..1..1. .0..0..1..0..0..1. .1..1..0..1..0..0. .1..1..0..0..1..1 %e A302210 ..0..1..0..0..1..1. .0..1..1..1..0..1. .1..1..0..0..1..1. .1..0..0..1..1..0 %e A302210 ..1..1..0..0..1..1. .0..0..1..1..0..0. .0..0..1..0..1..0. .1..1..0..0..1..1 %e A302210 ..0..1..1..1..1..0. .1..0..0..0..0..1. .1..0..0..1..1..1. .1..1..0..0..1..1 %Y A302210 Cf. A302212. %K A302210 nonn %O A302210 1,2 %A A302210 _R. H. Hardin_, Apr 03 2018