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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 (list; graph; refs; listen; history; text; internal format)
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 November 27 01:14 EST 2022. Contains 358362 sequences. (Running on oeis4.)