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%I #4 Jan 15 2013 20:07:29
%S 8,242,6798,193809,5501288,156275181,4438212854,126047555332,
%T 3579725111162,101663058496174,2887188399895922,81994856978729880,
%U 2328615956549861402,66131601824729724429,1878106344412444059646
%N Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two
%C Column 6 of A221419
%H R. H. Hardin, <a href="/A221417/b221417.txt">Table of n, a(n) for n = 1..16</a>
%e Some solutions for n=3
%e ..0..2..2..0..0..2....0..2..0..2..0..2....2..0..2..0..2..0....0..2..0..2..0..0
%e ..0..0..2..2..0..0....2..0..0..2..0..2....2..2..0..2..0..2....0..2..2..2..2..0
%e ..0..2..2..2..2..0....2..0..0..2..0..2....0..0..2..0..2..0....2..0..2..0..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 15 2013
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