A329980 a(n) is the number of non-isomorphic generalized signotopes on n elements (cf. A328377) w.r.t. relabeling of the vertices.

1, 2, 6, 167, 63451

Offset: 3

Author

Manfred Scheucher, Nov 26 2019

Keywords

• nonn
• more
• hard

References

• H. Bergold, S. Felsner, M. Scheucher, F. Schröder, and R. Steiner, Topological Drawings meet Classical Theorems from Convex Geometry, in preparation.

Links

• M. Balko, R. Fulek, and J. Kynčl, Crossing Numbers and Combinatorial Characterization of Monotone Drawings of K_n, Discrete & Computational Geometry, Volume 53, Issue 1, 2015, Pages 107-143.
• S. Felsner and H. Weil, Sweeps, arrangements and signotopes, Discrete Applied Mathematics, Volume 109, Issues 1-2, 2001, Pages 67-94.

Crossrefs

Cf. A006245, A328377.