Number of n X n 0..3 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

A229771

Number of n X n 0..3 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

Terms

    a(0) =4a(1) =60a(2) =3232a(3) =1058494a(4) =3062815568

External references