%I #6 Dec 18 2015 18:17:55

%S 4,50,1684,146946,33635880,21062625664,37432954261477

%N Number of n X n 0..3 arrays with every row and column running average nondecreasing rightwards and downwards

%C Diagonal of A201216

%e Some solutions for n=3

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

%e ..0..2..3....0..1..3....1..2..2....1..3..3....0..2..2....0..1..2....1..1..1

%e ..2..3..3....0..2..3....2..3..3....1..2..3....3..3..3....1..1..1....1..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 28 2011