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%I #13 May 01 2020 07:56:52
%S 1,2,8,26,99,364,1417,5541,22193,89799,368160,1523020,6355895,
%T 26713307,112999390,480666202,2054863538,8823764846,38042350806,
%U 164609190230,714613926565,3111673137244,13586653421083,59474496929094,260953934483595,1147456294303011,5055688301028252,22317001824137254
%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 (101).
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Jan 20 2017