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A014543
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Toroidal crossing number of complete graph.
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0
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0, 0, 0, 0, 0, 0, 0, 4, 9, 23, 42, 70, 105, 154, 226, 326
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,8
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REFERENCES
| Gardner, M. Crossing Numbers. Ch. 11 in Knotted Doughnuts and Other Mathematical Entertainments. New York: W. H. Freeman, 1986.
Guy, R. K.; Jenkyns, T.; and Schaer, J. ``Toroidal Crossing Number of Complete Graph.'' J. Comb. Th. 4, 376-390, 1968.
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LINKS
| Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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EXAMPLE
| a(7) = 0 and a(8) = 4.
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CROSSREFS
| Sequence in context: A060250 A138991 A138990 * A131607 A192473 A027119
Adjacent sequences: A014540 A014541 A014542 * A014544 A014545 A014546
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KEYWORD
| nonn,nice,more
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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