203601

Appears in sequences

• Used by Polya in calculating A000598.at n=18A036677
• Number of (n+1) X (2+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=7A250749