%I #4 Aug 12 2018 19:34:37
%S 8,97,508,3062,17703,103633,603215,3512154,20446744,119050218,
%T 693180972,4036155290,23501168666,136839336291,796768793476,
%U 4639312324422,27013128767994,157288207910023,915835429361804,5332596422248712
%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Column 4 of A318016.
%H R. H. Hardin, <a href="/A318012/b318012.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 5*a(n-1) +10*a(n-2) -30*a(n-3) -17*a(n-4) +84*a(n-5) +19*a(n-6) +24*a(n-7) +14*a(n-8) -490*a(n-9) -213*a(n-10) +715*a(n-11) +303*a(n-12) -544*a(n-13) -269*a(n-14) -82*a(n-15) -439*a(n-16) +318*a(n-17) +647*a(n-18) +21*a(n-19) -71*a(n-20) -24*a(n-21) -90*a(n-22) -21*a(n-23) +20*a(n-24) +4*a(n-25) -a(n-26) for n>29
%e Some solutions for n=5
%e ..0..0..1..1. .0..1..0..1. .0..1..1..0. .0..1..1..0. .0..1..1..1
%e ..0..1..1..0. .1..0..0..0. .0..0..0..1. .0..1..1..0. .0..1..1..1
%e ..1..1..0..0. .1..0..0..1. .0..0..1..1. .0..1..1..1. .0..1..1..1
%e ..1..1..0..0. .1..1..1..1. .0..0..1..1. .0..1..1..1. .0..0..0..0
%e ..1..0..0..1. .1..0..0..1. .1..0..1..1. .0..0..1..0. .0..0..1..1
%Y Cf. A318016.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 12 2018