Number of n X n 0..4 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

A229772

Number of n X n 0..4 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

Terms

    a(0) =5a(1) =135a(2) =21331a(3) =35452250a(4) =843211336888

External references