Number of Hamiltonian cycles on 2n X 2n grid with at least the symmetries of two reflections and 180-degree rotation.
A238818
Number of Hamiltonian cycles on 2n X 2n grid with at least the symmetries of two reflections and 180-degree rotation.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =40a(4) =488a(5) =13782a(6) =757626a(7) =95835196a(8) =24236840344
External references
- oeis: A238818