A063857 Total number of abstract order types of configurations of n points in dimensions 2 through n-1.

1, 4, 17, 157, 7420, 11403801

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 A063853.

Sequence in context: A072755 A320444 A129436 * A362646 A072654 A094545

Adjacent sequences: A063854 A063855 A063856 * A063858 A063859 A063860

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 26 2001

Status

approved