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%I #4 Nov 07 2012 12:39:47
%S 1,21,93,453,2050,9516,44129,204780,950346,4410194,20465923,94974721,
%T 440743516,2045330613,9491634200,44047218242,204407115009,
%U 948579057090,4402010267626,20428127976053,94799509246526,439930030199648
%N Unmatched value maps: number of 3Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..1 3Xn array
%C Row 3 of A218842
%H R. H. Hardin, <a href="/A218844/b218844.txt">Table of n, a(n) for n = 1..53</a>
%e Some solutions for n=3
%e ..1..0..1....0..0..1....0..0..1....1..0..0....1..1..1....1..0..0....1..0..1
%e ..0..0..1....0..0..1....0..0..0....0..0..1....1..1..1....0..0..0....0..0..1
%e ..0..0..1....0..0..1....0..0..0....1..1..1....1..0..0....0..1..1....0..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 07 2012
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