A308141 Number of (undirected) Hamiltonian paths in the n X n rook graph.

0, 4, 756, 11197440, 25328684620800, 14303252551164700262400, 2979637719108524426779310260224000

Offset: 1

Author

Eric W. Weisstein, May 14 2019

Keywords

• nonn
• hard
• more

Links

• Eric Weisstein's World of Mathematics, Hamiltonian Path
• Eric Weisstein's World of Mathematics, Rook Graph

Crossrefs

Cf. A096970.

Formula

a(n) = A096970(n)/2.