4,2

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.

A diagonal of A063858.

Sequence in context: A022518 A113053 A022503 this_sequence A093632 A077332 A005413

Adjacent sequences: A063858 A063859 A063860 this_sequence A063862 A063863 A063864

nonn

N. J. A. Sloane (njas(AT)research.att.com), Aug 26 2001