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A063800 Number of nonisomorphic oriented matroids with n points in 2 dimensions. +0
2
1, 2, 4, 17, 143, 4890, 461053, 95052532 (list; graph; listen)
OFFSET

3,2

LINKS

L. 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 13-th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001.

CROSSREFS

A diagonal of A063804.

Sequence in context: A112005 A009319 A009323 this_sequence A143674 A136147 A119510

Adjacent sequences: A063797 A063798 A063799 this_sequence A063801 A063802 A063803

KEYWORD

nonn

AUTHOR

njas, Aug 20 2001

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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