A121021 Number of crossing-optimal drawings of the complete graph K_n.

0, 0, 0, 0, 0, 1, 1, 5, 3, 3080, 5679

Offset: 0

Author

David Applegate, Sep 08 2006

Keywords

• nonn
• more

Comments

a(11) is at least 10^6.

Examples

			a(5)=1 because all drawings of K_5 with only 1 crossing are isomorphic.
		

References

• Shengjun Pan and R. Bruce Richter, in "The Crossing Number of K_11 is 100", submitted.

Crossrefs

Cf. A000241.