%I #9 Jun 13 2017 13:08:11
%S 1,1,1,3,21,980
%N Number of connected arrangements of n circles in the affine plane, in the sense that the union of the boundaries of the circles is a connected set and every circle intersects all the other circles.
%C These counts have been reduced for mirror symmetry.
%C See A250001, the main entry for this problem, for further information.
%Y Cf. A250001, A275923, A275924, A288554-A288568.
%K nonn,more
%O 0,4
%A _N. J. A. Sloane_, Jun 13 2017, based on information supplied by _Jon Wild_.
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