A296407 - cp's OEIS frontend

A296407 Number of digon-free connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set, reduced for mirror symmetry.

%I A296407 #8 Dec 11 2017 17:33:33
%S A296407 1,1,1,1,3,30,4509
%N A296407 Number of digon-free connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set, reduced for mirror symmetry.
%C A296407 For more information, see A288568.
%Y A296407 Cf. A250001, A275923, A275924, A288554-A288568, A296406, A296407-A296412, A006248.
%K A296407 nonn,more
%O A296407 0,5
%A A296407 _Manfred Scheucher_, Dec 11 2017

cp's OEIS Frontend

A296407 Number of digon-free connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set, reduced for mirror symmetry.