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 A303244 #4 Apr 20 2018 10:57:15 %S A303244 8,3,55,10,255,149,1676,3307,18505,65498,290437,1198777,5087180, %T A303244 21490967,90839013,384340750,1625471539,6876513885,29091034026, %U A303244 123070552817,520674602677,2202800218342,9319394664521,39427619066391,166806435914930 %N A303244 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303244 Row 4 of A303242. %H A303244 R. H. Hardin, <a href="/A303244/b303244.txt">Table of n, a(n) for n = 1..210</a> %H A303244 R. H. Hardin, <a href="/A303244/a303244.txt">Empirical recurrence of order 67</a> %F A303244 Empirical recurrence of order 67 (see link above) %e A303244 Some solutions for n=5 %e A303244 ..0..1..0..1..0. .0..1..0..0..0. .0..0..0..1..1. .0..0..1..1..1 %e A303244 ..1..1..1..1..1. .1..1..1..0..1. .1..0..1..1..1. .1..0..0..1..0 %e A303244 ..1..1..0..0..0. .1..1..0..0..1. .1..0..0..1..0. .0..0..1..1..0 %e A303244 ..1..1..1..0..0. .1..1..1..0..0. .0..0..0..1..0. .1..0..0..1..1 %Y A303244 Cf. A303242. %K A303244 nonn %O A303244 1,1 %A A303244 _R. H. Hardin_, Apr 20 2018