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%I #4 Feb 15 2014 13:36:09
%S 1768,21410,265306,3351086,42195634,529992314,6659762642,83778337524,
%T 1053822365410,13250382610758,166607568124526,2095232432433472,
%U 26349301348673676,331342826243559342,4166639480874835776
%N Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 2 of A237904
%H R. H. Hardin, <a href="/A237900/b237900.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..2..1..3....2..1..0....3..1..3....0..3..2....0..2..1....1..2..2....3..1..0
%e ..2..3..2....0..3..1....1..0..2....3..1..0....1..0..2....2..1..3....1..3..3
%e ..1..3..3....3..1..3....1..2..1....1..3..0....0..3..1....1..3..1....2..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 15 2014
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