Number of (n+1)X(2+1) 0..3 arrays with nondecreasing min(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.

A250513

Number of (n+1)X(2+1) 0..3 arrays with nondecreasing min(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.

Terms

    a(0) =889a(1) =14660a(2) =205022a(3) =2817780a(4) =36999777a(5) =480626844a(6) =6146257386a(7) =78207667892a(8) =989461227857

External references