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 A303316 #4 Apr 21 2018 12:49:55 %S A303316 8,6,11,36,50,128,439,1085,2431,6452,17455,43514,108524,281615,726261, %T A303316 1839731,4685152,12025643,30754258,78396104,200278695,512290781, %U A303316 1308785863,3342222476,8540451095,21826102586,55761123412,142456533311 %N A303316 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303316 Row 4 of A303314. %H A303316 R. H. Hardin, <a href="/A303316/b303316.txt">Table of n, a(n) for n = 1..210</a> %F A303316 Empirical: a(n) = a(n-1) +a(n-2) +5*a(n-3) +9*a(n-4) -3*a(n-5) -7*a(n-6) -2*a(n-7) for n>11 %e A303316 Some solutions for n=5 %e A303316 ..0..1..1..1..0. .0..1..0..1..0. .0..0..0..1..0. .0..1..0..1..0 %e A303316 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0 %e A303316 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..0..0 %e A303316 ..0..1..1..1..0. .0..0..0..1..0. .0..0..0..1..0. .0..1..0..1..1 %Y A303316 Cf. A303314. %K A303316 nonn %O A303316 1,1 %A A303316 _R. H. Hardin_, Apr 21 2018