%I #4 Apr 17 2018 13:09:04
%S 8,52,187,1047,5299,24030,123538,612923,2935811,14687358,72457509,
%T 353534815,1751242219,8627478474,42358776437,209066197468,
%U 1029686222268,5066170573231,24971517088006,122986845166051,605538409037300
%N Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Column 4 of A303016.
%H R. H. Hardin, <a href="/A303012/b303012.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 4*a(n-1) +4*a(n-2) +85*a(n-3) -321*a(n-4) -343*a(n-5) -2472*a(n-6) +7909*a(n-7) +10149*a(n-8) +29559*a(n-9) -63945*a(n-10) -98402*a(n-11) -124572*a(n-12) -16974*a(n-13) +164683*a(n-14) +221419*a(n-15) +214227*a(n-16) +32181*a(n-17) -113477*a(n-18) -158850*a(n-19) -106901*a(n-20) -44553*a(n-21) +13386*a(n-22) +51313*a(n-23) +65572*a(n-24) +39327*a(n-25) -9214*a(n-26) -54978*a(n-27) -59312*a(n-28) -20547*a(n-29) +21630*a(n-30) +31130*a(n-31) +20275*a(n-32) +1984*a(n-33) -5879*a(n-34) -5470*a(n-35) -2004*a(n-36) +570*a(n-37) +598*a(n-38) +248*a(n-39) -66*a(n-40) -32*a(n-41) -8*a(n-42) +4*a(n-43) for n>44
%e Some solutions for n=5
%e ..0..0..0..1. .0..0..0..1. .0..1..1..0. .0..0..1..0. .0..1..0..0
%e ..0..1..0..1. .0..1..0..1. .1..0..0..1. .1..1..0..1. .1..0..1..1
%e ..0..1..0..1. .0..1..1..1. .0..1..0..1. .0..1..0..1. .0..0..0..0
%e ..1..1..1..0. .0..0..0..0. .0..1..0..1. .0..0..1..0. .1..1..1..0
%e ..0..0..0..1. .0..1..1..1. .0..1..0..0. .1..0..0..0. .1..0..1..0
%Y Cf. A303016.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 17 2018