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A191956
Number of simple mixed arrangements of n pseudolines and 2 double pseudolines in the Mobius plane.
0
1, 7, 140, 5589, 416569
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OFFSET
0,2
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:
A351280
A306628
A302912
*
A215042
A221267
A070074
Adjacent sequences:
A191953
A191954
A191955
*
A191957
A191958
A191959
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Jun 20 2011
STATUS
approved
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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)