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%I #4 Jan 16 2014 06:45:28
%S 2894,87888,2287822,52447112,1113883030,22196597522,422920594570,
%T 7766100008976,138645436041864,2418329907871922,41404091421401562,
%U 697988478843485434,11617489583931774864,191301863229644130672
%N Number of (2+1)X(n+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise
%C Row 2 of A235818
%H R. H. Hardin, <a href="/A235819/b235819.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..2..1..3....0..1..0....1..0..3....2..2..3....0..3..0....3..3..3....1..3..3
%e ..2..0..3....2..3..3....0..2..3....1..1..0....2..1..2....2..1..1....3..2..1
%e ..2..1..0....3..2..3....2..2..2....1..1..3....3..1..2....2..2..2....2..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 16 2014