%I #4 Apr 29 2018 11:11:18
%S 64,719,294,406,564,894,1476,2252,3461,5631,9362,15569,26111,43960,
%T 73883,124371,209956,354631,598917,1012022,1710721,2891805,4888812,
%U 8266307,13977941,23636428,39970625,67595175,114312998,193321957,326943993
%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 3 king-move adjacent elements, with upper left element zero.
%C Column 7 of A303727.
%H R. H. Hardin, <a href="/A303726/b303726.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 2*a(n-1) -a(n-4) -a(n-5) +a(n-7) -a(n-8) -a(n-9) +2*a(n-10) for n>18
%e Some solutions for n=5
%e ..0..1..1..0..0..0..1. .0..1..1..0..0..0..1. .0..1..1..0..0..0..1
%e ..1..1..1..0..0..0..0. .0..1..1..0..0..0..0. .1..1..1..0..0..0..0
%e ..1..1..1..0..0..0..0. .0..1..1..0..0..0..0. .1..1..1..0..0..0..0
%e ..1..1..1..0..0..0..0. .0..1..1..0..0..0..0. .1..1..1..0..0..0..1
%e ..0..1..1..0..0..0..1. .0..1..1..0..0..0..0. .1..1..1..0..0..1..1
%Y Cf. A303727.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 29 2018