%I #4 Nov 24 2014 20:48:01
%S 110,6012,393910,28135982,2039109478,147966207622,10608507190002,
%T 752883908026920,52789559542083230,3668155942062924886,
%U 252635964025577748788
%N Number of (n+1)X(n+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
%C Diagonal of A250536
%e Some solutions for n=2
%e ..0..1..1....1..1..2....1..1..2....0..0..1....0..1..1....0..0..3....1..0..2
%e ..2..1..2....0..3..1....1..1..3....1..1..1....2..0..1....2..3..3....0..1..2
%e ..1..3..1....3..0..3....2..2..3....1..1..3....0..3..2....3..2..3....1..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 24 2014