This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A296408 #7 Dec 11 2017 17:33:44 %S A296408 1,1,1,3,20,900,530530 %N A296408 Number of cylindrical connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set and two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry. %C A296408 For more information, see A288568. %Y A296408 Cf. A250001, A275923, A275924, A288554-A288568, A296406, A296407-A296412, A006248. %K A296408 nonn,more %O A296408 0,4 %A A296408 _Manfred Scheucher_, Dec 11 2017