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

A223926

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

Terms

    a(0) =3a(1) =54a(2) =1116a(3) =21334a(4) =386495a(5) =6621074a(6) =108796955a(7) =1735753333a(8) =27144561576

External references