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A135340 Number of labeled non-planar projective-planar 2-connected K_{3,3}-free homeomorphically irreducible graphs with n vertices. 2
1, 0, 420, 36960, 3651480, 453448800, 67528553400, 11697130922400, 2306595939347700, 509359060543132800, 124356566550728011500, 33226132945543622884800, 9635384706205021006042800 (list; graph; refs; listen; history; internal format)
OFFSET

5,3

LINKS

A. Gagarin et al., Table of n, a(n) for n = 5..20

A. Gagarin, G. Labelle and P. Leroux, Counting labeled projective-planar graphs without a K_{3,3}-subdivision, 0406140.htm

CROSSREFS

Cf. A104592, A104593.

Sequence in context: A022046 A107510 A023911 * A135380 A035846 A046167

Adjacent sequences:  A135337 A135338 A135339 * A135341 A135342 A135343

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Dec 07 2007

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Last modified February 15 17:46 EST 2012. Contains 205835 sequences.