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A191939
Number of arrangements of pseudolines of order n.
0
1, 1, 1, 46, 153528
OFFSET
0,4
LINKS
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: A209474 A336439 A159406 * A159446 A116328 A340550
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 19 2011
STATUS
approved