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%I #5 Mar 31 2012 12:35:52
%S 81,6561,531441,43146816,3486784401,282429536481,22876792454961,
%T 1853020188851841,150094687634051328,12157665459056928801,
%U 984770902183611232881,79766443076872509863361,6461081889226673298932241
%N Number of nX4 0..3 arrays with no element equal to the sum mod 4 of its horizontal and vertical neighbors
%C Column 4 of A183508
%H R. H. Hardin, <a href="/A183506/b183506.txt">Table of n, a(n) for n = 1..15</a>
%e Some solutions for 3X4
%e ..2..2..0..3....0..2..3..3....2..0..2..0....2..2..1..1....2..2..0..1
%e ..3..1..0..2....1..0..0..1....1..3..1..0....1..0..3..1....1..1..2..2
%e ..1..1..2..2....2..2..3..3....2..2..2..0....0..0..3..3....3..1..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 05 2011