%I #16 May 10 2018 03:29:48
%S 1,1,1,8,278,144395,436634633
%N Number of non-isomorphic cylindrical arrangements of n pairwise intersecting pseudo-circles on a sphere, in the sense that two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry.
%C For more information, see A296406.
%Y Cf. A250001, A275923, A275924, A288554-A288568, A296406, A296407-A296412, A006248.
%K nonn,more
%O 0,4
%A _Manfred Scheucher_, Dec 11 2017
%E a(7) corrected by _Manfred Scheucher_, May 09 2018