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A063854 Number of abstract order types of configurations of n points in 2 dimensions. 2
1, 3, 11, 93, 2121, 122508, 15296266 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
LINKS
J. Ferté, V. Pilaud and M. Pocchiola, On the number of simple arrangements of five double pseudolines, arXiv:1009.1575 [cs.CG], 2010; Discrete Comput. Geom. 45 (2011), 279-302.
Lukas Finschi, A Graph Theoretical Approach for Reconstruction and Generation of Oriented Matroids, A dissertation submitted to the Swiss Federal Institute of Technology, Zurich for the degree of Doctor of Mathematics, 2001.
L. Finschi and K. Fukuda, Complete combinatorial generation of small point set configurations and hyperplane arrangements, pp. 97-100 in Abstracts 13th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001.
CROSSREFS
A diagonal of A063853.
Sequence in context: A297485 A231066 A091547 * A066384 A328810 A120587
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Aug 26 2001
STATUS
approved

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Last modified June 17 12:36 EDT 2024. Contains 373445 sequences. (Running on oeis4.)