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%I #5 Feb 01 2013 05:06:18
%S 6,232,5748,153652,4053833,107220027,2834169558,74925759485,
%T 1980733759947,52362769529788,1384263535086577,36594432454954146,
%U 967411477937300180,25574518045138377146,676088703977133126785
%N Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns
%C Column 3 of A221929
%H R. H. Hardin, <a href="/A221926/b221926.txt">Table of n, a(n) for n = 1..41</a>
%e Some solutions for n=3
%e ..0..2..0....0..1..1....1..2..0....0..3..0....0..4..1....0..1..1....0..2..1
%e ..0..1..1....1..3..0....1..2..1....0..2..1....0..1..0....0..5..0....0..2..2
%e ..2..2..1....2..1..0....1..1..0....0..1..2....1..1..1....2..0..0....0..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 01 2013