%I #6 Dec 18 2015 18:17:43
%S 2,8,72,1020,32768,2097152,268460064,68721573888,35184372088832,
%T 36028797020012544
%N Number of lower triangles of an n X n 0..2 array with each element unequal to the sum mod 3 of its horizontal and vertical neighbors
%C Column 2 of A194505
%e Some solutions for 3X3
%e ..1......1......2......0......0......0......0......2......0......1......1
%e ..0.0....2.0....0.0....2.0....2.1....2.2....2.2....1.2....2.0....0.2....2.1
%e ..1.2.0..2.2.1..0.1.2..0.2.0..2.1.0..1.1.0..1.1.2..1.2.0..0.2.1..2.1.2..1.1.0
%K nonn
%O 1,1
%A _R. H. Hardin_ Aug 27 2011
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