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%I #4 Feb 13 2014 06:43:06
%S 1902,26230,367726,5195344,73170922,1029281994,14489762434,
%T 204068007444,2873241939356,40449727138522,569502983806472,
%U 8018543062571802,112896834642809590,1589503574124427514,22379268785330234876
%N Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 2 of A237791
%H R. H. Hardin, <a href="/A237787/b237787.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..0..1..0....3..1..2....0..0..3....1..0..2....3..1..2....3..2..1....3..2..3
%e ..3..1..0....0..1..0....0..1..1....1..2..0....1..2..1....1..3..1....0..3..1
%e ..3..3..2....0..3..2....3..3..3....2..3..2....2..3..1....1..2..0....3..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 13 2014
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