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A191954 Number of simple mixed arrangements of 2 pseudolines and n double pseudolines in the projective plane. 0
1, 2, 48, 86715 (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: A137592 A203778 A203305 * A212170 A057527 A166475

Adjacent sequences:  A191951 A191952 A191953 * A191955 A191956 A191957

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 20 2011

STATUS

approved

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Last modified November 22 18:55 EST 2019. Contains 329410 sequences. (Running on oeis4.)