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Number of crossing-maximal order types of n points in the plane.
1

%I #6 Jun 12 2018 12:11:09

%S 1,1,1,1,1,3,17,489,28103,2866895

%N Number of crossing-maximal order types of n points in the plane.

%H Alexander Pilz and Emo Welzl, <a href="http://drops.dagstuhl.de/opus/volltexte/2015/5119/">Order on order types</a>, Discrete & Computational Geometry, 59 (No. 4, 2015), 886-922.

%Y Cf. A006247, A305376.

%K nonn,more

%O 1,6

%A _N. J. A. Sloane_, Jun 12 2018