Number of n X n 0..2 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

A229770

Number of n X n 0..2 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

Terms

    a(0) =3a(1) =22a(2) =322a(3) =12958a(4) =2179956a(5) =1976588468

External references