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 A329980 #9 Dec 30 2019 14:35:56 %S A329980 1,2,6,167,63451 %N A329980 a(n) is the number of non-isomorphic generalized signotopes on n elements (cf. A328377) w.r.t. relabeling of the vertices. %D A329980 H. Bergold, S. Felsner, M. Scheucher, F. Schröder, and R. Steiner, Topological Drawings meet Classical Theorems from Convex Geometry, in preparation. %H A329980 M. Balko, R. Fulek, and J. Kynčl, <a href="http://doi.org/10.1007/s00454-014-9644-z">Crossing Numbers and Combinatorial Characterization of Monotone Drawings of K_n</a>, Discrete & Computational Geometry, Volume 53, Issue 1, 2015, Pages 107-143. %H A329980 S. Felsner and H. Weil, <a href="http://doi.org/10.1016/S0166-218X(00)00232-8">Sweeps, arrangements and signotopes</a>, Discrete Applied Mathematics, Volume 109, Issues 1-2, 2001, Pages 67-94. %Y A329980 Cf. A006245, A328377. %K A329980 nonn,more,hard %O A329980 3,2 %A A329980 _Manfred Scheucher_, Nov 26 2019