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Search: a308139 -id:a308139
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A307928
Number of (undirected) Hamiltonian cycles in the n X n queen graph.
+10
0
3, 1960, 402364270, 39741746126749664
(list; graph; refs; listen; history; text; internal format)
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.
KEYWORD
nonn,more,hard
AUTHOR
Eric W. Weisstein, May 06 2019
STATUS
approved
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Last modified November 28 04:31 EST 2024. Contains 378181 sequences.
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