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

A250464

Number of (n+1) X (4+1) 0..1 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) =233a(1) =2322a(2) =21753a(3) =204721a(4) =1920345a(5) =18018051a(6) =169000988a(7) =1585251989a(8) =14869200736a(9) =139470660434

External references