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 A302518 #4 Apr 09 2018 09:12:06 %S A302518 16,9,14,48,90,199,689,2125,5410,13908,39850,114503,312683,845807, %T A302518 2344052,6547828,18092168,49718487,137265089,380242741,1051385042, %U A302518 2901539840,8012628856,22150069687,61220830095,169117170519,467176484780 %N A302518 Number of 5Xn 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302518 Row 5 of A302515. %H A302518 R. H. Hardin, <a href="/A302518/b302518.txt">Table of n, a(n) for n = 1..210</a> %F A302518 Empirical: a(n) = a(n-1) +a(n-2) +3*a(n-3) +20*a(n-4) +7*a(n-5) -2*a(n-6) -6*a(n-7) -40*a(n-8) -6*a(n-9) -2*a(n-10) -2*a(n-11) +22*a(n-12) -5*a(n-13) for n>17 %e A302518 Some solutions for n=5 %e A302518 ..0..1..0..1..0. .0..0..0..1..0. .0..1..0..0..0. .0..1..0..1..0 %e A302518 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0 %e A302518 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..1..1..0 %e A302518 ..0..0..0..1..0. .0..0..0..1..0. .0..1..0..1..0. .0..0..0..1..0 %e A302518 ..1..1..0..1..0. .1..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0 %Y A302518 Cf. A302515. %K A302518 nonn %O A302518 1,1 %A A302518 _R. H. Hardin_, Apr 09 2018