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%I #6 Dec 18 2015 18:18:04
%S 4,256,196916,1971161340,260988770962672,455585601029801268422
%N Number of n X n 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically
%C Diagonal of A209092
%e Some solutions for n=4
%e ..0..1..3..0....3..2..2..1....1..3..0..1....1..0..2..1....2..0..1..1
%e ..2..0..3..0....1..2..2..0....0..0..1..1....0..1..1..2....2..0..1..2
%e ..2..0..3..1....1..3..1..3....0..1..1..3....2..1..0..3....1..3..0..0
%e ..1..2..0..2....1..0..3..3....3..0..3..1....1..0..2..0....1..3..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 05 2012
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