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A063801 Number of nonisomorphic oriented matroids with n points in 3 dimensions. 0
1, 3, 12, 206, 181472 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

REFERENCES

Fukuda, Komei; Miyata, Hiroyuki; Moriyama, Sonoko. Complete Enumeration of Small Realizable Oriented Matroids. Discrete Comput. Geom. 49 (2013), no. 2, 359--381. MR3017917. - From N. J. A. Sloane, Feb 16 2013

LINKS

Table of n, a(n) for n=4..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

A diagonal of A063804.

Sequence in context: A120606 A089428 A211892 * A160320 A321603 A297564

Adjacent sequences:  A063798 A063799 A063800 * A063802 A063803 A063804

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 20 2001

STATUS

approved

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Last modified January 23 10:36 EST 2020. Contains 331171 sequences. (Running on oeis4.)