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%I #14 May 01 2020 07:56:59
%S 1,1,4,11,41,141,537,2041,8042,32028,129780,531331,2198502,9171233,
%T 38545677,163031436,693470737,2964491394,12729640115,54881425222,
%U 237471970199,1030935383055,4489081879021,19601108680782,85803380983100,376481393024385,1655473716162471
%N Related to enumeration of sets of non-intersecting circles in the plane.
%C Needs a more precise definition.
%H R. J. Mathar, <a href="http://arxiv.org/abs/1603.00077">Topologically Distinct Sets of Non-intersecting Circles in the Plane</a>, arXiv:1603.00077 [math.CO], 2016. See (102).
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Jan 20 2017