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 A303467 #4 Apr 24 2018 10:42:12 %S A303467 32,1405,29009,692636,17247543,427097893,10589284528,263136262937, %T A303467 6538180319944,162474283068763,4038093885728800,100363335141370610, %U A303467 2494483012817443067,61999957389103505229,1541003358426712853022 %N A303467 Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303467 Column 6 of A303469. %H A303467 R. H. Hardin, <a href="/A303467/b303467.txt">Table of n, a(n) for n = 1..210</a> %e A303467 Some solutions for n=5 %e A303467 ..0..1..0..1..1..0. .0..1..0..0..1..1. .0..1..0..1..1..1. .0..1..0..1..1..1 %e A303467 ..0..0..0..1..0..0. .0..0..0..1..0..1. .0..0..0..1..1..0. .0..0..0..0..1..0 %e A303467 ..0..0..0..0..1..1. .0..0..0..1..1..1. .0..1..0..0..0..0. .0..1..0..0..1..1 %e A303467 ..1..0..0..0..0..1. .0..1..1..1..0..0. .0..0..0..1..0..1. .0..1..0..1..1..0 %e A303467 ..1..0..1..1..1..1. .1..1..0..1..1..0. .1..1..0..1..0..0. .0..1..1..0..0..1 %Y A303467 Cf. A303469. %K A303467 nonn %O A303467 1,1 %A A303467 _R. H. Hardin_, Apr 24 2018