A191955 Number of simple mixed arrangements of n pseudolines and 1 double pseudoline in the Mobius plane.

1, 1, 3, 13, 122, 2445, 102413, 7862130

Offset

0,3

Links

Table of n, a(n) for n=0..7.

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: A344210 A260847 A121921 * A241458 A302861 A182864

Adjacent sequences: A191952 A191953 A191954 * A191956 A191957 A191958

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 20 2011

Status

approved