T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing maximum of every three consecutive values in every row and column.

A250459

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing maximum of every three consecutive values in every row and column.

Terms

    a(0) =19683a(1) =373248a(2) =373248a(3) =6859000a(4) =17318918a(5) =6859000a(6) =120553784a(7) =772693886a(8) =772693886a(9) =120553784a(10) =1990865512a(11) =32602562806a(12) =83130231052a(13) =32602562806a(14) =1990865512a(15) =32248529487

External references