A108239 Number of triangulated surfaces with n vertices.

1, 1, 3, 9, 43, 655, 42426, 11590894, 12561206794

Offset

4,3

Links

Table of n, a(n) for n=4..12.

F. H. Lutz, Enumeration and random realization of triangulated surfaces, arXiv:math/0610022 [math.CO], 2006-2007.

F. H. Lutz, The Manifold Page.

T. Sulanke and F. H. Lutz, Isomorphism free lexicographic enumeration of triangulated surfaces and 3-manifolds, arXiv:math/0610022 [math.CO], 2006-2007.

Crossrefs

Cf. A000109.

Sequence in context: A232216 A167143 A136732 * A218921 A262128 A028858

Adjacent sequences: A108236 A108237 A108238 * A108240 A108241 A108242

Keyword

nonn,hard,more,nice

Author

Ralf Stephan, Jun 17 2005

Extensions

a(11)-a(12) from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 08 2006

Status

approved