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 A300809 #4 Mar 13 2018 07:53:29 %S A300809 32,1490,34836,872495,22066384,559634028,14189038853,359766695966, %T A300809 9121562946307,231272831721241,5863793161067426,148673270791278610, %U A300809 3769528495204343311,95574315400763857215,2423234009392860653804 %N A300809 Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. %C A300809 Column 6 of A300811. %H A300809 R. H. Hardin, <a href="/A300809/b300809.txt">Table of n, a(n) for n = 1..210</a> %e A300809 Some solutions for n=5 %e A300809 ..0..0..0..0..1..0. .0..0..0..0..1..1. .0..0..0..1..0..0. .0..0..0..0..1..0 %e A300809 ..0..1..1..1..1..0. .0..1..1..0..0..0. .0..1..1..0..1..0. .0..1..0..1..1..0 %e A300809 ..0..0..0..0..1..0. .0..0..1..1..1..1. .0..0..1..0..1..0. .0..1..0..1..0..1 %e A300809 ..0..1..0..1..0..0. .0..1..0..0..1..0. .0..1..1..0..1..1. .0..0..0..1..0..0 %e A300809 ..0..1..0..1..1..1. .0..1..1..0..1..1. .0..1..0..0..1..1. .0..0..1..0..1..0 %Y A300809 Cf. A300811. %K A300809 nonn %O A300809 1,1 %A A300809 _R. H. Hardin_, Mar 13 2018