Number of nX6 0..3 arrays with rows unimodal and columns nondecreasing.

A223985

Number of nX6 0..3 arrays with rows unimodal and columns nondecreasing.

Terms

    a(0) =610a(1) =52591a(2) =1738756a(3) =31585056a(4) =378122264a(5) =3322756326a(6) =22985966340a(7) =131366850521a(8) =642224541548

External references