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A063852 Number of nonisomorphic nondegenerate oriented matroids with n points in dimensions 2 through n-1. 2
1, 2, 3, 7, 25, 2901 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
LINKS
Table of n, a(n) for n=3..8.
Lukas Finschi, Homepage of Oriented Matroids
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
Row sums of A063851.
Sequence in context: A301317 A325125 A091230 * A301519 A274692 A342155
Adjacent sequences: A063849 A063850 A063851 * A063853 A063854 A063855
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Aug 26 2001
STATUS
approved

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Last modified May 20 15:51 EDT 2024. Contains 372717 sequences. (Running on oeis4.)