Number of 6Xn 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.

A223869

Number of 6Xn 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =84a(1) =7056a(2) =303560a(3) =8008548a(4) =145947740a(5) =1989679315a(6) =21476594002a(7) =191485393983

External references