Number of (n+1) X (4+1) 0..3 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.

A250540

Number of (n+1) X (4+1) 0..3 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.

Terms

    a(0) =36552a(1) =491650a(2) =4169584a(3) =27240292a(4) =151170400a(5) =752602024a(6) =3475227442a(7) =15210145612a(8) =64036997144a(9) =262068107390

External references