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A129349
Number of directed Hamiltonian circuits in the ntriangular graph.
2
0, 2, 32, 6432, 19497984, 1109403156480, 1380937534541660160
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OFFSET
2,2
LINKS
Table of n, a(n) for n=2..8.
Eric Weisstein's World of Mathematics,
Hamiltonian Cycle
Eric Weisstein's World of Mathematics,
Triangular Graph
CROSSREFS
Sequence in context:
A012599
A247859
A202629
*
A180127
A342099
A091804
Adjacent sequences:
A129346
A129347
A129348
*
A129350
A129351
A129352
KEYWORD
nonn
,
more
AUTHOR
Eric W. Weisstein
, Apr 10 2007
EXTENSIONS
a(6) from
Alois P. Heinz
, Nov 29 2010
a(7)a(8) from
Eric W. Weisstein
, Mar 31 2014
Missing factor of 2 applied to a(8) by
Eric W. Weisstein
, Apr 08 2014
Offset corrected by
Eric W. Weisstein
, May 06 2019
STATUS
approved
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Last modified September 27 13:37 EDT 2023. Contains 365693 sequences. (Running on oeis4.)