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 A299449 #4 Feb 10 2018 10:29:20 %S A299449 13,32,6,36,163,211,804,3138,4869,21921,69029,124071,546218,1618499, %T A299449 3376921,13736175,39336909,93790311,354629529,1001089492,2646208503, %U A299449 9425431827,26696252479,75904957451,258154313037,742028632025 %N A299449 Number of nX6 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. %C A299449 Column 6 of A299451. %H A299449 R. H. Hardin, <a href="/A299449/b299449.txt">Table of n, a(n) for n = 1..210</a> %e A299449 Some solutions for n=5 %e A299449 ..0..0..0..1..0..0. .0..1..1..1..1..1. .0..1..1..1..1..0. .0..1..1..0..1..1 %e A299449 ..0..0..0..1..0..0. .0..1..1..1..1..1. .0..1..1..1..1..0. .0..1..1..0..1..1 %e A299449 ..1..1..0..0..0..0. .1..1..1..1..1..1. .1..1..0..0..1..1. .1..1..1..1..1..1 %e A299449 ..1..1..0..0..1..1. .1..0..0..0..0..0. .0..1..1..1..1..0. .0..1..1..0..1..1 %e A299449 ..1..1..0..0..1..1. .1..0..0..0..0..0. .0..1..1..1..1..0. .0..1..1..0..1..1 %Y A299449 Cf. A299451. %K A299449 nonn %O A299449 1,1 %A A299449 _R. H. Hardin_, Feb 10 2018