Number of nX4 0..3 arrays with rows nondecreasing and antidiagonals unimodal.

A224020

Number of nX4 0..3 arrays with rows nondecreasing and antidiagonals unimodal.

Terms

    a(0) =35a(1) =1225a(2) =32523a(3) =772683a(4) =17735200a(5) =403836633a(6) =9186127249a(7) =208983591829

External references