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

A250530

Number of (n+1)X(2+1) 0..3 arrays with nondecreasing max(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) =700a(1) =6012a(2) =44017a(3) =289035a(4) =1767743a(5) =10248336a(6) =57297797a(7) =311492811a(8) =1660155153a(9) =8712978900a(10) =45218940684a(11) =232652531053

External references