%I
%S 50,1180,21955,300131,3183434,27910024,212707851,1462376991,
%T 9314700106,56025183452,322542598187
%N Number of (n+1)X(n+1) 0..2 arrays with nondecreasing x(i,j)x(i,j1) in the i direction and nondecreasing x(i,j)x(i1,j) in the j direction
%C Diagonal of A250527
%e Some solutions for n=3
%e ..2..1..2..1....1..1..0..0....2..2..1..1....2..1..2..0....2..0..1..0
%e ..1..0..1..0....0..0..0..0....1..1..0..0....2..1..2..1....2..1..2..2
%e ..1..1..2..1....1..1..2..2....2..2..1..1....1..1..2..2....2..1..2..2
%e ..0..0..2..1....0..1..2..2....0..2..1..2....0..1..2..2....0..1..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 24 2014
