A191944 Number of chirotopes on n marked double pseudolines.

1, 1, 1, 1086, 58266120

Offset

0,4

Links

Table of n, a(n) for n=0..4.

J. Ferté, V. Pilaud and M. Pocchiola, On the number of simple arrangements of five double pseudolines, arXiv:1009.1575 [cs.CG], 2010; Discrete Comput. Geom. 45 (2011), 279-302.

Crossrefs

Sequence in context: A237804 A010091 A206630 * A157256 A223429 A168661

Adjacent sequences: A191941 A191942 A191943 * A191945 A191946 A191947

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 20 2011

Status

approved