

A058789


Number of polyhedra with n faces and n+1 vertices (or n vertices and n+1 faces).


1



0, 1, 2, 11, 74, 633, 6134, 64439, 709302, 8085725, 94713809, 1134914458, 13865916560, 172301697581, 2173270387051
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OFFSET

4,3


COMMENTS

Through a(18) the only primes are 2, 11, and 64439.  Jonathan Vos Post, Apr 23 2011


LINKS

Table of n, a(n) for n=4..18.
G. P. Michon, Counting Polyhedra


EXAMPLE

a(5)=1 because the triangular prism is the only pentahedron with 6 vertices.


CROSSREFS

Cf. A002856, A000109, A058786, A058787, A058788.
Sequence in context: A231556 A207397 A166992 * A212028 A158265 A198088
Adjacent sequences: A058786 A058787 A058788 * A058790 A058791 A058792


KEYWORD

hard,nice,nonn


AUTHOR

Gerard P. Michon, Nov 30 2000


STATUS

approved



