Number of n X n 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing.

A224051

Number of n X n 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing.

Terms

    a(0) =3a(1) =54a(2) =1232a(3) =27246a(4) =568107a(5) =11231300a(6) =212819499a(7) =3903149379a(8) =69818587635

External references