Number of (undirected) Hamiltonian cycles in the binary n-cube, or the number of cyclic n-bit Gray codes.

A066037

Number of (undirected) Hamiltonian cycles in the binary n-cube, or the number of cyclic n-bit Gray codes.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =1344a(4) =906545760

External references