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A191959
Number of mixed arrangements of n pseudolines and 1 double pseudoline in the projective plane.
0
1, 1, 3, 16, 159, 4671, 342294
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..6.
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:
A229954
A228513
A135753
*
A349591
A091146
A350415
Adjacent sequences:
A191956
A191957
A191958
*
A191960
A191961
A191962
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Jun 20 2011
STATUS
approved
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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)