%I #6 Apr 26 2021 19:27:08
%S 17837,924323,41559689,1647458581,60893670493,2094824462739,
%T 68611567225003,2143539826346751,64564856564377493,
%U 1881089804262142705,53326114376091385649,1475596467988352153487,40006226305036094218101
%N Number of (4+1) X (n+1) 0..2 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
%C Row 4 of A235784.
%H R. H. Hardin, <a href="/A235787/b235787.txt">Table of n, a(n) for n = 1..143</a>
%e Some solutions for n=1
%e ..0..0....0..2....2..0....0..2....1..2....0..0....1..0....2..0....1..0....0..2
%e ..1..2....1..2....2..0....2..0....2..0....2..1....2..2....0..1....0..1....2..0
%e ..2..0....2..1....1..2....0..1....1..0....1..1....0..1....2..2....0..2....1..0
%e ..1..0....2..0....2..0....1..1....0..2....0..1....2..2....2..0....1..2....2..2
%e ..1..2....1..2....2..2....1..2....1..2....0..0....1..2....1..1....0..0....1..0
%Y Cf. A235784.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 15 2014