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%I #4 Feb 14 2014 07:54:11
%S 1414,11454,95470,811498,6710651,55582616,466228162,3923377300,
%T 32640488162,271793432028,2276818267492,19078882880296,
%U 159120721843014,1327754678683016,11110560232889918,92946946885743656,776064525722366116
%N Number of (n+1)X(3+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 3 of A237868
%H R. H. Hardin, <a href="/A237863/b237863.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..2..1..0..1....1..1..2..0....0..2..1..2....0..1..1..0....0..2..1..2
%e ..1..1..2..0....0..1..1..1....2..1..0..2....2..0..2..0....1..2..1..1
%e ..2..2..2..0....2..0..1..2....1..0..2..0....1..1..0..2....1..2..2..0
%e ..2..1..1..2....0..0..2..1....2..0..2..1....1..2..1..2....0..2..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 14 2014
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