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 A280231 #4 Dec 29 2016 11:48:55 %S A280231 8,24,52,288,1102,4260,16282,59648,220330,806580,2928596,10606308, %T A280231 38210998,137282336,491839132,1757295568,6265155736,22290508020, %U A280231 79158223310,280632840576,993329469088,3510893492340,12392392661846 %N A280231 Number of nX6 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. %C A280231 Column 6 of A280233. %H A280231 R. H. Hardin, <a href="/A280231/b280231.txt">Table of n, a(n) for n = 1..210</a> %e A280231 Some solutions for n=4 %e A280231 ..0..0..0..0..0..0. .0..0..0..0..0..1. .0..0..0..0..0..0. .0..0..1..0..0..0 %e A280231 ..0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0 %e A280231 ..1..1..0..0..0..0. .0..0..0..0..1..1. .1..1..1..0..0..1. .0..0..0..0..0..0 %e A280231 ..1..1..0..0..0..0. .0..0..0..0..1..1. .1..1..1..1..1..1. .0..0..0..0..0..0 %Y A280231 Cf. A280233. %K A280231 nonn %O A280231 1,1 %A A280231 _R. H. Hardin_, Dec 29 2016