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%I #4 Dec 10 2015 12:38:38
%S 16,1098,545952,36820624,41288839953,26221405955605,25544452579997378,
%T 10202665890135311754,6793627222521230286004,
%U 3807755132746454550366863,3480803626161613825050823467,2175071862470489220837962752225
%N Number of 4Xn 0..4*n-1 arrays with upper left zero and lower right 4*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
%C Row 4 of A265619.
%H R. H. Hardin, <a href="/A265622/b265622.txt">Table of n, a(n) for n = 1..13</a>
%e Some solutions for n=2
%e ..0..1....0..4....0..4....0..2....0..1....0..2....0..4....0..4....0..2....0..1
%e ..1..2....3..4....0..4....3..4....6..4....3..1....2..1....3..1....3..2....6..4
%e ..5..3....5..4....6..4....3..5....5..7....3..2....5..1....5..4....3..7....6..4
%e ..6..7....5..7....5..7....3..7....5..7....3..7....5..7....3..7....6..7....6..7
%Y Cf. A265619.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 10 2015
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