A307928 Number of (undirected) Hamiltonian cycles in the n X n queen graph.

3, 1960, 402364270, 39741746126749664

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

Eric Weisstein's World of Mathematics, Queen Graph

Formula

a(n) = A158663(n)/2. - Andrew Howroyd, Sep 08 2019

Crossrefs

Cf. A158663, A158664, A308139.

Sequence in context: A255862 A367941 A236481 * A193149 A024047 A102987

Adjacent sequences: A307925 A307926 A307927 * A307929 A307930 A307931

Keyword

nonn,more,hard

Author

Eric W. Weisstein, May 06 2019

Status

approved