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A113203
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Number of isomorphism classes of simple quadrangulations of the sphere having n vertices and n-2 faces, minimal degree 3, with orientation-reversing isomorphisms forbidden.
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1
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1, 0, 1, 1, 4, 3, 16, 26, 99, 256, 895, 2789, 9740, 32799, 115024, 401180, 1421170, 5046539, 18066772, 64940825, 234712099, 851801048, 3104690139, 11358900851, 41710948878, 153684688127, 568079430741, 2106188450292
(list; graph; refs; listen; history; internal format)
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OFFSET
| 8,5
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REFERENCES
| G. Brinkmann et al., Generation of simple quadrangulations of the sphere, Discr. Math., 305 (2005), 33-54.
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.
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LINKS
| G. Brinkmann et al., Generation of simple quadrangulations of the sphere
Gunnar Brinkmann and Brendan McKay, plantri and fullgen programs for generation of certain types of planar graph.
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CROSSREFS
| Cf. A113201, A078666, A007022, A002880, A113202, etc.
Sequence in context: A176737 A046162 A060509 * A034486 A130515 A161893
Adjacent sequences: A113200 A113201 A113202 * A113204 A113205 A113206
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 07 2006
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