3,3

Also number of self-dual polyhedra with n+1 vertices (and n+1 faces). - Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Dec 18 2006

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

M. B. Dillencourt, Polyhedra of small orders and their Hamiltonian properties. Tech. Rep. 92-91, Info. and Comp. Sci. Dept., Univ. Calif. Irvine, 1992.

P. J. Federico, Enumeration of polyhedra: the number of 9-hedra, J. Combin. Theory, 7 (1969), 155-161.

Sequence in context: A151445 A000136 A013989 this_sequence A136509 A100664 A003446

Adjacent sequences: A002838 A002839 A002840 this_sequence A002842 A002843 A002844

nonn,nice

N. J. A. Sloane (njas(AT)research.att.com).

Definition corrected by Gordon Royle (gordon(AT)maths.uwa.edu.au), Dec 15 2005