Number of (undirected) Hamiltonian cycles on a 2n X 2n square grid of points.

A003763

Number of (undirected) Hamiltonian cycles on a 2n X 2n square grid of points.

Terms

    a(0) =1a(1) =6a(2) =1072a(3) =4638576a(4) =467260456608

External references