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%I #4 Jan 12 2014 11:20:35
%S 549,8678,125917,1660676,20719004,246491295,2840913933,31961677744,
%T 353604367053,3864978556436,41891682636375,451399864543279,
%U 4844588916295676,51852752086001215,553984358739359500
%N Number of (n+1)X(2+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise
%C Column 2 of A235588
%H R. H. Hardin, <a href="/A235585/b235585.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0..1..1....1..0..1....2..0..1....0..1..2....1..1..0....1..1..1....0..0..2
%e ..0..0..1....1..1..0....0..0..2....0..1..2....2..1..1....1..2..2....0..1..0
%e ..0..2..1....2..2..0....0..0..1....2..1..0....1..2..0....2..2..0....0..2..0
%e ..1..2..0....1..2..1....1..1..1....0..2..2....2..2..1....0..2..2....2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 12 2014