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%I #4 Aug 12 2016 07:05:16
%S 0,0,4,1608,951040,586218384,1092575917680,1790692038513408
%N Number of nX3 arrays containing 3 copies of 0..n-1 with no element plus any horizontal or vertical neighbor equal to n-1.
%C Column 3 of A265663.
%e Some solutions for n=4
%e ..3..2..0....3..2..3....3..1..3....0..1..3....2..0..2....1..3..3....1..3..2
%e ..1..3..1....1..0..2....2..0..2....1..3..1....0..2..3....3..1..1....0..2..3
%e ..0..1..0....1..1..3....2..0..0....0..2..3....1..0..1....2..0..0....2..0..1
%e ..2..3..2....0..0..2....3..1..1....2..0..2....3..1..3....0..2..2....0..1..3
%Y Cf. A265663.
%K nonn
%O 1,3
%A _R. H. Hardin_, Dec 12 2015