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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.
0

%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