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A113205 Same as A002880, but with orientation-reversing isomorphisms forbidden. 4
1, 0, 1, 1, 3, 2, 12, 16, 59, 133, 445, 1248, 4162, 13014, 43474, 143304, 484444, 1639388, 5617205, 19332596, 67048051, 233691112, 819121608, 2884443024, 10204104900, 36247138920, 129264732757, 462661038926, 1661637913984 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,5
LINKS
G. Brinkmann, S. Greenberg, C. Greenhill, B. D. McKay, R. Thomas, and P. Wollan, Generation of simple quadrangulations of the sphere, Discr. Math., 305 (2005), 33-54.
Gunnar Brinkmann and Brendan McKay, plantri and fullgen programs for generation of certain types of planar graph.
Gunnar Brinkmann and Brendan McKay, plantri and fullgen programs for generation of certain types of planar graph [Cached copy, pdf file only, no active links, with permission]
CombOS - Combinatorial Object Server, generate planar graphs
CROSSREFS
Sequence in context: A152550 A114798 A167639 * A136657 A006774 A361865
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 07 2006
STATUS
approved

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Last modified April 23 06:45 EDT 2024. Contains 371906 sequences. (Running on oeis4.)