A305376 - OEIS

%I #7 Jun 12 2018 12:11:16

%S 1,1,1,1,1,6,49,1179,55278,4888160

%N Number of crossing-minimal 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, A305375.

%K nonn,more

%O 1,6

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