%I #4 Aug 12 2018 19:36:38
%S 64,4105,37700,603215,7960400,109443619,1493271874,20443576030,
%T 279709797313,3828247661823,52400061484204,717264682586055,
%U 9818436168350577,134403118254988711,1839845040971963605
%N Number of nX7 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 7 of A318016.
%H R. H. Hardin, <a href="/A318015/b318015.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..1..1..0..0. .0..0..0..1..0..0..1. .0..0..0..0..1..1..0
%e ..0..0..0..1..1..0..0. .0..0..1..1..0..0..0. .0..0..0..1..1..0..0
%e ..0..0..1..1..1..0..0. .0..0..1..1..1..0..0. .0..0..0..1..1..0..0
%e ..0..0..1..1..1..0..0. .0..0..1..1..1..1..1. .0..0..1..1..0..0..0
%e ..0..0..0..0..1..1..1. .0..1..1..1..1..0..0. .0..1..1..1..0..0..1
%Y Cf. A318016.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 12 2018