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A308139
Number of (undirected) Hamiltonian paths on the n X n queen graph.
1
0, 12, 22928, 10221735256, 1881495851872220832
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Hamiltonian Path
Eric Weisstein's World of Mathematics, Queen Graph
FORMULA
a(n) = A158664(n)/2.
CROSSREFS
Cf. A158664.
Sequence in context: A013750 A127395 A076807 * A220791 A146519 A277693
KEYWORD
nonn,more,hard
AUTHOR
Eric W. Weisstein, May 14 2019
STATUS
approved