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%I #6 Dec 18 2015 18:18:00
%S 3,81,12534,12584703,86510224720,4019515127529418,
%T 1256433426475190769775,2643803004141585682944365943
%N Number of n X n 0..2 arrays avoiding the pattern z z+1 z in any row or column
%C Diagonal of A207221
%e Some solutions for n=4
%e ..2..0..2..1....2..1..0..2....2..0..0..0....2..0..1..1....0..2..0..1
%e ..1..1..1..0....1..1..1..2....0..1..1..0....2..1..0..1....2..0..1..1
%e ..0..1..2..2....1..1..2..2....0..1..1..2....1..2..2..2....0..2..1..1
%e ..0..0..0..2....1..1..0..1....2..2..0..1....1..0..0..0....2..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 16 2012
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