T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with nondecreasing maximum of every two consecutive values in every row and column.
A251120
T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with nondecreasing maximum of every two consecutive values in every row and column.
Terms
- a(0) =256a(1) =2500a(2) =2500a(3) =22500a(4) =64660a(5) =22500a(6) =173056a(7) =1494029a(8) =1494029a(9) =173056a(10) =1252161a(11) =27945953a(12) =86208566a(13) =27945953a(14) =1252161a(15) =8444836a(16) =480842776a(17) =3816838692a(18) =3816838692a(19) =480842776a(20) =8444836a(21) =54700816a(22) =7521121248a(23) =152303295344
External references
- oeis: A251120