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

A224368

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

Terms

    a(0) =3a(1) =54a(2) =1838a(3) =77793a(4) =3607078a(5) =174854516a(6) =8684742989a(7) =437757725110

External references