%I #3 Jan 18 2013 17:50:40
%S 0,64,664,31663,730874,22664752,617892584,17782943460,499912745268,
%T 14194927933912,401323009766448,11367289765226164,321716709992052606,
%U 9108319376609834007,257833317722010551358,7299063007433073641077
%N Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction
%C Row 3 of A221507
%e Some solutions for n=3
%e ..0..3..1....1..4..0....1..1..1....0..0..0....0..3..0....0..3..0....1..1..0
%e ..0..3..2....0..1..2....0..1..1....1..2..2....0..0..2....2..3..1....2..4..0
%e ..0..0..0....0..1..0....0..4..0....0..4..0....1..3..0....0..0..0....0..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 18 2013
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