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A135380
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Number of labeled non-planar 2-connected K_{3,3}-free toroidal irreducible graphs having n vertices.
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1
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1, 0, 420, 37520, 3656520, 454406400, 67651907400, 11713973686800, 2309360318565300, 509886615053415600, 124470953623133617500, 33253861507512510664800, 9642802738009988846098800
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,3
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REFERENCES
| A. Gagarin, G. Labelle and P. Leroux, The structure of K_{3,3}-subdivision-free toriodal graphs, Discrte Math., 307 (2007), 2993-3005.
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LINKS
| A. Gagarin et al., Table of n, a(n) for n = 5..20
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CROSSREFS
| Sequence in context: A107510 A023911 A135340 * A035846 A046167 A059951
Adjacent sequences: A135377 A135378 A135379 * A135381 A135382 A135383
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 10 2007
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