a(11) is at least 10^6
Shengjun Pan and R. Bruce Richter, in "The Crossing Number of K_11 is 100", submitted.
Table of n, a(n) for n=0..10.
a(5)=1 because all drawings of K_5 with only 1 crossing are isomorphic.
Sequence in context: A100653 A105318 A304287 * A237518 A274649 A258234
Adjacent sequences: A121018 A121019 A121020 * A121022 A121023 A121024
David Applegate, Sep 08 2006