A235781 - OEIS

%I #4 Jan 15 2014 13:12:15

%S 3199,86691,1998795,41559689,807571787,14878043073,263391351981,

%T 4508888392477,75130028343785,1222874406744241,19515692813220075,

%U 306085217228732839,4728915176920700761,72089433981418124645

%N Number of (n+1)X(3+1) 0..2 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

%C Column 3 of A235784

%H R. H. Hardin, <a href="/A235781/b235781.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 15 2014