%I #4 Jan 04 2013 06:50:57
%S 2,318,12542,577414,25530633,1136389329,50496693142,2244479038934,
%T 99754529748792,4433564852824255,197047640578291149,
%U 8757684228677158709,389230724960761808734,17299155383196445062953,768851839790098893898403
%N Number of nX3 arrays of occupancy after each element moves to some king-move neighbor
%C Column 3 of A221192
%H R. H. Hardin, <a href="/A221190/b221190.txt">Table of n, a(n) for n = 1..21</a>
%e Some solutions for n=3
%e ..0..2..1....2..3..0....0..0..1....1..2..0....2..0..0....2..1..1....0..0..2
%e ..2..1..0....0..1..2....0..4..0....2..1..0....0..3..1....2..1..1....1..2..0
%e ..2..1..0....0..0..1....1..2..1....1..0..2....0..0..3....0..1..0....3..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 04 2013