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 A301445 #4 Mar 21 2018 11:53:06 %S A301445 4,29,171,1008,5930,34976,206266,1216562,7175157,42318566,249591629, %T A301445 1472072549,8682172154,51206792942,302013780922,1781254373986, %U A301445 10505703200049,61961840678551,365446236883416,2155374188205965 %N A301445 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. %C A301445 Column 3 of A301450. %H A301445 R. H. Hardin, <a href="/A301445/b301445.txt">Table of n, a(n) for n = 1..210</a> %F A301445 Empirical: a(n) = 5*a(n-1) +7*a(n-2) -10*a(n-3) -a(n-4) +7*a(n-5) -17*a(n-6) +5*a(n-8) -11*a(n-9) +5*a(n-10) -2*a(n-12) +2*a(n-13) %e A301445 Some solutions for n=5 %e A301445 ..0..0..1. .0..0..1. .0..1..1. .0..0..0. .0..1..1. .0..0..1. .0..1..0 %e A301445 ..1..0..0. .0..1..1. .1..0..1. .1..0..1. .1..0..0. .0..1..1. .1..0..0 %e A301445 ..1..1..1. .0..0..1. .1..0..1. .0..1..1. .0..0..0. .1..0..0. .0..1..1 %e A301445 ..0..1..0. .1..0..0. .0..0..0. .0..0..0. .0..1..0. .0..1..1. .1..0..0 %e A301445 ..0..0..1. .1..1..0. .1..1..0. .1..0..0. .0..1..0. .0..0..1. .1..1..1 %Y A301445 Cf. A301450. %K A301445 nonn %O A301445 1,1 %A A301445 _R. H. Hardin_, Mar 21 2018