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 A296412 #10 Dec 11 2017 17:39:45 %S A296412 1,1,1,1,2,14,2131,3012906 %N A296412 Number of non-isomorphic digon-free 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 A296412 For more information, see A296406. %Y A296412 Cf. A250001, A275923, A275924, A288554-A288568, A296406, A296407-A296412, A006248. %K A296412 nonn,more %O A296412 0,5 %A A296412 _Manfred Scheucher_, Dec 11 2017