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 A300087 #6 Feb 25 2018 06:18:02 %S A300087 13,32,6,98,533,1822,13646,64560,292356,1935206,8977877,47025964, %T A300087 277252018,1342509714,7412660838,41080319424,209198027664, %U A300087 1166155310631,6311894489681,33391174168101,185469661266839,1001589651401307 %N A300087 Number of nX6 0..1 arrays with every element equal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. %C A300087 Column 6 of A300089. %H A300087 R. H. Hardin, <a href="/A300087/b300087.txt">Table of n, a(n) for n = 1..210</a> %e A300087 Some solutions for n=5 %e A300087 ..0..0..0..0..0..1. .0..0..0..1..1..0. .0..0..0..1..1..0. .0..0..1..1..1..0 %e A300087 ..0..0..0..0..0..1. .0..0..0..1..1..0. .0..0..0..1..1..0. .0..0..1..1..1..0 %e A300087 ..0..0..1..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..1..1..1..1 %e A300087 ..0..0..0..0..1..0. .1..1..0..0..1..0. .0..0..0..0..1..0. .1..1..1..0..0..1 %e A300087 ..0..0..0..0..1..0. .1..1..0..0..1..0. .0..0..0..0..1..0. .1..1..1..0..0..1 %Y A300087 Cf. A300089. %K A300087 nonn %O A300087 1,1 %A A300087 _R. H. Hardin_, Feb 24 2018