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%I #5 Mar 31 2012 12:36:29
%S 28,1736,98356,5184780,279785830,15068331840,811669674888,
%T 43723066740718,2355282493094894,126874994917842426,
%U 6834535322256736280,368164567512212216530,19832386906421976298012,1068336297549353928162784
%N Number of nX4 0..2 arrays with no element equal to the average of its horizontal and vertical neighbors
%C Column 4 of A197442
%H R. H. Hardin, <a href="/A197438/b197438.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
%e ..1..1..1..2....1..1..2..1....1..1..1..2....1..1..2..1....1..1..1..2
%e ..0..1..2..0....1..2..1..2....0..0..2..2....0..0..0..0....1..0..0..2
%e ..0..0..0..1....1..0..0..1....1..2..0..1....1..2..1..2....0..2..0..0
%e ..2..2..1..0....0..0..2..2....2..1..1..0....0..2..2..1....2..2..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Oct 15 2011
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