A191954 Number of simple mixed arrangements of 2 pseudolines and n double pseudolines in the projective plane.

1, 2, 48, 86715

Offset

0,2

Links

Table of n, a(n) for n=0..3.

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: A137592 A203778 A203305 * A344665 A212170 A057527

Adjacent sequences: A191951 A191952 A191953 * A191955 A191956 A191957

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 20 2011

Status

approved