Number of linear extensions of a 2 X 2 X n lattice.

A114714

Number of linear extensions of a 2 X 2 X n lattice.

Terms

    a(0) =1a(1) =2a(2) =48a(3) =2452a(4) =183958a(5) =17454844a(6) =1941406508a(7) =242201554680

External references