%I A002880 M0381 N0143
%S A002880 1,0,1,1,2,2,9,11,37,79,249,671,2182,6692,22131,72405,243806,822788,
%T A002880 2815119,9679205,33551192,116900081,409675567,1442454215,5102542680,
%U A002880 18124571838,64634480340,231334873091,830828150081,2993489821771
%N A002880 Number of 3-connected nets with n edges.
%D A002880 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002880 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002880 Gunnar Brinkmann, Sam Greenberg, Catherine Greenhill, Brendan D. McKay, 
               Robin Thomas and Paul Wollan, Generation of simple quadrangulations 
               of the sphere, Discr. Math., 305 (2005), 33-54.
%D A002880 M. B. Dillencourt, Polyhedra of small orders and their Hamiltonian properties. 
               Journal of Combinatorial Theory, Series B, 66 (1996) 87-122.
%D A002880 P. J. Federico, Enumeration of polyhedra: the number of 9-hedra, J. Combin. 
               Theory, 7 (1969), 155-161.
%D A002880 N. D. Kazarinoff and R. Weitzenkamp, Squaring rectangles and squares, 
               Amer. Math. Monthly, 80 (1973), 877-888.
%H A002880 G. Brinkmann et al., <a href="http://www.math.gatech.edu/~thomas/quad.pdf">
               Generation of simple quadrangulations of the sphere</a>
%H A002880 Gunnar Brinkmann and Brendan McKay, <a href="http://cs.anu.edu.au/people/
               bdm/plantri/">plantri and fullgen</a> programs for generation of 
               certain types of planar graph.
%Y A002880 Cf. A113201, A078666, A007022.
%Y A002880 Sequence in context: A010765 A143022 A154100 this_sequence A066324 A143146 
               A039796
%Y A002880 Adjacent sequences: A002877 A002878 A002879 this_sequence A002881 A002882 
               A002883
%K A002880 nonn,nice
%O A002880 6,5
%A A002880 N. J. A. Sloane (njas(AT)research.att.com).