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%I #5 Dec 18 2015 18:17:43
%S 4,64,4160,1048560,1073741824,4398046511104,72057594037927936
%N Number of lower triangles of an n X n 0..4 array with each element unequal to the sum mod 5 of its horizontal and vertical neighbors
%C Column 4 of A194505
%e Some solutions for 3X3
%e ..0......1......3......1......0......1......2......2......4......1......0
%e ..2.0....0.3....2.4....0.2....1.0....4.0....4.2....0.4....2.3....2.2....3.4
%e ..4.1.4..2.4.0..1.1.4..1.4.2..0.3.1..0.0.2..3.1.2..2.0.1..3.4.0..3.3.4..3.2.4
%K nonn
%O 1,1
%A _R. H. Hardin_ Aug 27 2011
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