A235831 - OEIS

%I #4 Jan 16 2014 07:52:28

%S 20537,1403872,87473420,4948377018,264596677243,13346776888685,

%T 644799592944959,29960807090645254,1349539165629052781,

%U 59215045232911300005,2544072449211208400584,107453219274532827649732

%N Number of (n+1)X(4+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

%C Column 4 of A235833

%H R. H. Hardin, <a href="/A235831/b235831.txt">Table of n, a(n) for n = 1..85</a>

%e Some solutions for n=1

%e ..0..1..0..1..0....1..1..2..2..2....2..1..2..2..1....1..0..1..0..0

%e ..0..1..1..0..2....0..0..2..0..1....1..1..1..2..1....0..2..1..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 16 2014