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A063805 Number of nonisomorphic oriented matroids with n points in dimensions 2 through n-1. 1
1, 3, 8, 34, 380, 192448 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..8.

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

CROSSREFS

Row sums of A063804.

Sequence in context: A303870 A186517 A094448 * A125046 A270378 A218154

Adjacent sequences:  A063802 A063803 A063804 * A063806 A063807 A063808

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 20 2001

STATUS

approved

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Last modified April 26 04:04 EDT 2019. Contains 322469 sequences. (Running on oeis4.)