A063801 Number of nonisomorphic oriented matroids with n points in 3 dimensions.

1, 3, 12, 206, 181472

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.

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

A diagonal of A063804.

Sequence in context: A120606 A089428 A211892 * A366504 A160320 A321603

Adjacent sequences: A063798 A063799 A063800 * A063802 A063803 A063804

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 20 2001

Status

approved