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 A303086 #4 Apr 18 2018 12:22:50 %S A303086 8,3,112,90,1455,3667,33152,157838,1161232,7100035,49678916,329669849, %T A303086 2281641594,15540614996,107301648292,737154651791,5087197252026, %U A303086 35051028229325,241871543186476,1668193998276026,11511498465288360 %N A303086 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303086 Row 4 of A303084. %H A303086 R. H. Hardin, <a href="/A303086/b303086.txt">Table of n, a(n) for n = 1..210</a> %H A303086 R. H. Hardin, <a href="/A303086/a303086.txt">Empirical recurrence of order 67</a> %F A303086 Empirical recurrence of order 67 (see link above) %e A303086 Some solutions for n=5 %e A303086 ..0..1..0..1..0. .0..1..0..1..1. .0..1..0..0..1. .0..1..1..1..1 %e A303086 ..1..1..1..1..1. .1..1..1..1..0. .0..1..0..0..1. .1..1..1..1..1 %e A303086 ..1..1..1..1..0. .0..1..0..1..1. .0..1..0..0..0. .0..1..0..1..0 %e A303086 ..0..1..0..1..1. .1..1..1..1..0. .0..1..0..0..1. .1..1..1..1..1 %Y A303086 Cf. A303084. %K A303086 nonn %O A303086 1,1 %A A303086 _R. H. Hardin_, Apr 18 2018