A137892 Number of directed Hamiltonian paths in the n-triangular graph.

0, 6, 240, 95520, 512386560, 46817046743040, 87639428459458068480

Offset

2,2

Links

Table of n, a(n) for n=2..8.

Eric Weisstein's World of Mathematics, Hamiltonian Path

Eric Weisstein's World of Mathematics, Triangular Graph

Crossrefs

Sequence in context: A367776 A052510 A234633 * A064382 A080358 A233826

Adjacent sequences: A137889 A137890 A137891 * A137893 A137894 A137895

Keyword

nonn,more

Author

Eric W. Weisstein, Feb 20 2008

Extensions

a(6) from Eric W. Weisstein, Dec 16 2013

a(7) from Eric W. Weisstein, Dec 24 2013

a(8) from Eric W. Weisstein, Feb 05 2014

Status

approved