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

A224256

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

Terms

    a(0) =3a(1) =36a(2) =648a(3) =12467a(4) =238366a(5) =4480391a(6) =83124099a(7) =1530419762a(8) =28072690614a(9) =514262753781

External references