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%I #6 Dec 18 2015 18:18:00
%S 4,256,197144,1980856064,261322412243484,453485461047011453843,
%T 10355292626528629423108103805
%N Number of n X n 0..3 arrays avoiding the pattern z-1 z-1 z in any row or column
%C Diagonal of A207057
%e Some solutions for n=4
%e ..3..1..1..1....0..0..2..2....0..2..2..1....1..3..0..1....2..2..1..0
%e ..3..3..3..1....0..3..3..0....1..0..1..1....0..0..2..0....3..2..2..0
%e ..3..1..3..3....2..0..1..2....2..2..1..0....0..1..1..3....2..0..3..0
%e ..3..1..1..1....1..1..0..0....0..3..0..0....3..0..3..1....1..2..3..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 14 2012
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