A113205 Same as A002880, but with orientation-reversing isomorphisms forbidden.

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

Offset

6,5

Links

Table of n, a(n) for n=6..34.

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

Cf. A113201, A078666, A007022, A002880, A113202, A113203, A113204.

Sequence in context: A152550 A114798 A167639 * A136657 A006774 A361865

Adjacent sequences: A113202 A113203 A113204 * A113206 A113207 A113208

Keyword

nonn

Author

N. J. A. Sloane, Jan 07 2006

Status

approved