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%I #4 Feb 07 2013 05:44:38
%S 21,3014,439644,62776264,8936245171,1271770432077,181000238870646,
%T 25760940724765249,3666476510299319316,521840279989725924865,
%U 74272277349160073400124,10570998423180909949529557
%N Number of nX4 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 4 of A222093
%H R. H. Hardin, <a href="/A222092/b222092.txt">Table of n, a(n) for n = 1..24</a>
%e Some solutions for n=3
%e ..0..1..1..3....0..2..0..1....0..3..1..0....0..4..0..2....0..1..2..2
%e ..0..1..1..1....0..3..1..0....0..0..2..1....0..1..1..0....0..2..1..1
%e ..0..3..0..1....0..2..3..0....1..2..2..0....1..0..3..0....1..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 07 2013