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%I #5 Jan 11 2013 05:51:52
%S 0,20,0,790,0,34042,0,1470618,0,63526554,0,2744129114,0,118536728562,
%T 0,5120367434418,0,221181729631882,0,9554266491058090,0,
%U 412710429318366178,0,17827626812331482594,0,770090248640353835354,0
%N Number of nX3 arrays of occupancy after each element stays put or moves to some king-move neighbor, with every occupancy equal to zero or two
%C Column 3 of A221337
%H R. H. Hardin, <a href="/A221335/b221335.txt">Table of n, a(n) for n = 1..30</a>
%F Empirical: a(n) = 66*a(n-2) -1131*a(n-4) +6726*a(n-6) -18808*a(n-8) +27860*a(n-10) -19388*a(n-12) +3240*a(n-14)
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 11 2013
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