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A191955
Number of simple mixed arrangements of n pseudolines and 1 double pseudoline in the Mobius plane.
0
1, 1, 3, 13, 122, 2445, 102413, 7862130
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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
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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)