Number of (undirected) Hamiltonian cycles on a triangular grid, n vertices on each side.

A112676

Number of (undirected) Hamiltonian cycles on a triangular grid, n vertices on each side.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =26a(5) =474a(6) =17214a(7) =1371454a(8) =231924780a(9) =82367152914

External references