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A191960
Number of mixed arrangements of n pseudolines and 2 double pseudolines in the projective plane.
0
1, 9, 265, 18532
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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:
A188963
A306535
A144684
*
A168600
A088672
A300169
Adjacent sequences:
A191957
A191958
A191959
*
A191961
A191962
A191963
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Jun 20 2011
STATUS
approved
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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)