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%I #4 Jan 12 2014 07:54:20
%S 2894,102188,3103656,82875972,2014103692,45287503606,960171131904,
%T 19390838361256,376783995824816,7089022103744966,129887547400655616,
%U 2327062746593565046,40910982027733215718,707691314157678278018
%N Number of (n+1)X(2+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise
%C Column 2 of A235577
%H R. H. Hardin, <a href="/A235575/b235575.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..2..2..1....2..2..1....1..1..1....3..0..2....0..2..3....2..1..2....2..3..2
%e ..3..2..0....3..2..1....1..3..1....2..2..3....0..1..0....1..0..0....3..3..0
%e ..1..0..0....0..0..2....3..3..1....1..2..2....0..3..0....2..1..1....2..3..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 12 2014
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