Number of nX3 0..3 arrays with rows unimodal and antidiagonals nondecreasing.

A224199

Number of nX3 0..3 arrays with rows unimodal and antidiagonals nondecreasing.

Terms

    a(0) =50a(1) =984a(2) =16060a(3) =263516a(4) =4357084a(5) =72105068a(6) =1193130640a(7) =19742052632a(8) =326659600368

External references