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%I #4 Feb 07 2013 05:43:59
%S 8,306,11698,439979,16518325,620167586,23285438194,874320487561,
%T 32829136547878,1232675333611674,46284755942965861,
%U 1737909791864677612,65255401994426759727,2450223514629565888639,92001505833953763778608
%N Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns
%C Column 3 of A222093
%H R. H. Hardin, <a href="/A222091/b222091.txt">Table of n, a(n) for n = 1..55</a>
%e Some solutions for n=3
%e ..0..1..1....1..0..1....0..1..2....0..2..0....0..1..1....1..0..0....0..0..1
%e ..1..0..3....2..3..0....0..1..2....4..0..0....0..2..1....1..3..0....3..1..1
%e ..0..2..1....0..2..0....0..1..2....0..0..3....2..0..2....0..3..1....0..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 07 2013