T(n,k)=Number of (n+1)X(k+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.

A250454

T(n,k)=Number of (n+1)X(k+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) =44a(1) =217a(2) =217a(3) =1000a(4) =2029a(5) =1000a(6) =4535a(7) =17024a(8) =17024a(9) =4535a(10) =20242a(11) =141857a(12) =258377a(13) =141857a(14) =20242a(15) =89677a(16) =1155519a(17) =3865967a(18) =3865967a(19) =1155519a(20) =89677a(21) =395240a(22) =9376751a(23) =56575618a(24) =104578590a(25) =56575618a(26) =9376751a(27) =395240a(28) =1736779a(29) =75647740

External references