Number of (n+1)X(2+1) 0..2 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.

A250448

Number of (n+1)X(2+1) 0..2 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) =217a(1) =2029a(2) =17024a(3) =141857a(4) =1155519a(5) =9376751a(6) =75647740a(7) =609534839a(8) =4903892459a(9) =39438538201a(10) =317050695780

External references