A014543 Toroidal crossing number of complete graph.

0, 0, 0, 0, 0, 0, 0, 4, 9, 23, 42, 70, 105, 154, 226, 326

Offset

1,8

References

Martin Gardner, Crossing Numbers. Ch. 11 in Knotted Doughnuts and Other Mathematical Entertainments. New York: W. H. Freeman, 1986.

Links

Table of n, a(n) for n=1..16.

Richard K. Guy, Tom Jenkyns, and Jonathan Schaer, Toroidal Crossing Number of Complete Graphw/a>, J. Comb. Th. 4, 376-390, 1968.

Eric Weisstein's World of Mathematics, Toroidal Crossing Number.

Example

a(7) = 0 and a(8) = 4.

Crossrefs

Sequence in context: A138991 A361002 A138990 * A343676 A131607 A221313

Adjacent sequences: A014540 A014541 A014542 * A014544 A014545 A014546

Keyword

nonn,nice,more

Author

Eric W. Weisstein

Status

approved