Number of 3 X n reduced (normalized) Latin rectangles.

A001623

Number of 3 X n reduced (normalized) Latin rectangles.

Terms

    a(0) =1a(1) =4a(2) =46a(3) =1064a(4) =35792a(5) =1673792a(6) =103443808a(7) =8154999232a(8) =798030483328

External references