T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

A250913

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

Terms

    a(0) =74a(1) =603a(2) =603a(3) =4909a(4) =13401a(5) =4909a(6) =39960a(7) =297873a(8) =297873a(9) =39960a(10) =325277a(11) =6621219a(12) =18077319a(13) =6621219a(14) =325277a(15) =2647773a(16) =147178899a(17) =1096982379a(18) =1096982379a(19) =147178899a(20) =2647773a(21) =21553018a(22) =3271547025a(23) =66566704705a(24) =181725094746

External references