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%I #6 Dec 18 2015 18:18:00
%S 4,256,180294,1391081032,118749552817647
%N Number of n X n 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
%C Diagonal of A206974
%e Some solutions for n=4
%e ..1..1..1..3....0..0..2..2....1..0..0..0....0..1..3..0....3..2..3..0
%e ..3..3..2..0....0..3..3..0....0..3..1..2....2..0..3..0....1..1..1..1
%e ..0..2..1..1....2..0..1..2....1..0..1..3....2..0..3..2....2..1..2..3
%e ..0..1..0..0....1..1..0..0....1..3..3..1....1..2..0..2....0..1..3..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 14 2012
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