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

A250710

Number of (3+1)X(n+1) 0..3 arrays with nondecreasing 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) =2435a(1) =30719a(2) =301632a(3) =2492054a(4) =18235293a(5) =122690762a(6) =774796977a(7) =4673805813a(8) =27196779938a(9) =154066279127a(10) =854122044467

External references