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A191951
Number of simple mixed arrangements of n pseudolines and 1 double pseudoline in the projective plane.
0
1, 1, 2, 5, 25, 302, 9194, 556298
OFFSET
0,3
LINKS
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: A191506 A139007 A015486 * A356674 A370555 A120767
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 20 2011
STATUS
approved