Number of Hamiltonian cycles in the Cartesian product graph K_2 times K_n.

A276356

Number of Hamiltonian cycles in the Cartesian product graph K_2 times K_n.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =30a(4) =480a(5) =12000a(6) =430920a(7) =21052080a(8) =1343381760a(9) =108519626880

External references