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 A303195 #4 Apr 19 2018 13:35:15 %S A303195 13,65,105,283,2106,8250,32223,159440,703465,2973340,13494853, %T A303195 60180498,262407902,1167392813,5190322216,22874608873,101334971043, %U A303195 449454168985,1987423197338,8798329818980,38980239305306,172530975264447 %N A303195 Number of nX6 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303195 Column 6 of A303197. %H A303195 R. H. Hardin, <a href="/A303195/b303195.txt">Table of n, a(n) for n = 1..210</a> %e A303195 Some solutions for n=5 %e A303195 ..0..1..0..0..0..1. .0..1..0..1..1..1. .0..1..0..1..0..1. .0..1..0..1..1..0 %e A303195 ..0..1..1..1..0..1. .0..1..0..0..0..1. .0..0..0..1..1..1. .1..1..0..1..0..1 %e A303195 ..1..1..1..1..1..1. .0..1..0..1..0..1. .0..1..0..1..0..1. .0..1..0..1..0..1 %e A303195 ..0..1..0..1..0..1. .1..0..0..0..1..0. .0..1..0..1..0..1. .0..1..0..1..1..1 %e A303195 ..0..0..1..1..0..1. .1..0..1..1..1..0. .0..1..0..1..1..0. .1..0..0..1..0..1 %Y A303195 Cf. A303197. %K A303195 nonn %O A303195 1,1 %A A303195 _R. H. Hardin_, Apr 19 2018