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 A303413 #4 Apr 23 2018 10:44:02 %S A303413 0,162,2327,3256,21361,236326,1716995,8688851,56229035,428784791, %T A303413 3021617644,19058753004,128800589241,899664264951,6188584855591, %U A303413 41513163165807,282748964373121,1940464266658865,13278427810584311 %N A303413 Number of 6Xn 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303413 Row 6 of A303410. %H A303413 R. H. Hardin, <a href="/A303413/b303413.txt">Table of n, a(n) for n = 1..210</a> %e A303413 Some solutions for n=5 %e A303413 ..0..0..0..0..0. .0..1..0..1..1. .0..0..1..0..0. .0..0..1..0..0 %e A303413 ..0..0..0..0..0. .1..0..1..0..0. .1..0..1..1..0. .1..0..1..1..1 %e A303413 ..1..1..1..1..1. .1..1..1..1..1. .1..1..0..0..0. .0..1..1..0..0 %e A303413 ..1..0..1..0..1. .0..0..1..0..0. .0..0..1..0..0. .1..0..1..0..1 %e A303413 ..1..1..0..1..1. .1..0..1..0..1. .1..0..1..1..0. .1..0..1..1..1 %e A303413 ..0..0..1..0..0. .1..1..1..1..1. .1..1..1..0..1. .0..1..0..0..1 %Y A303413 Cf. A303410. %K A303413 nonn %O A303413 1,2 %A A303413 _R. H. Hardin_, Apr 23 2018