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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
OFFSET
5,3
LINKS
A. Gagarin, G. Labelle and P. Leroux, Counting labeled projective-planar graphs without a K_{3,3}-subdivision, arXiv:math/0406140 [math.CO], 2004-2006.
CROSSREFS
Sequence in context: A289348 A107510 A023911 * A135380 A035846 A223941
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 07 2007
STATUS
approved