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 A298053 #4 Jan 11 2018 07:19:25 %S A298053 5,49,34,141,231,512,780,1577,3162,6228,12289,24231,47917,95955, %T A298053 187945,374818,743024,1477074,2928956,5839339,11579457,23039070, %U A298053 45786076,91055211,180969990,360008076,715728819,1423402113,2830545436,5629547006 %N A298053 Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero. %C A298053 Column 6 of A298055. %H A298053 R. H. Hardin, <a href="/A298053/b298053.txt">Table of n, a(n) for n = 1..210</a> %e A298053 Some solutions for n=5 %e A298053 ..0..1..0..1..0..0. .0..1..1..0..1..0. .0..1..0..1..0..0. .0..1..0..1..1..0 %e A298053 ..0..0..1..1..0..1. .0..0..1..0..0..1. .0..0..1..1..0..1. .0..1..0..0..1..0 %e A298053 ..0..0..0..1..1..1. .0..0..1..1..1..0. .1..1..0..0..0..1. .1..0..0..1..0..1 %e A298053 ..0..1..0..0..1..1. .1..0..1..1..1..0. .0..1..1..1..0..0. .0..0..0..0..1..0 %e A298053 ..1..1..0..1..0..1. .0..1..0..0..1..0. .0..1..0..0..1..1. .1..1..1..1..0..1 %Y A298053 Cf. A298055. %K A298053 nonn %O A298053 1,1 %A A298053 _R. H. Hardin_, Jan 11 2018