A191939 Number of arrangements of pseudolines of order n.

1, 1, 1, 46, 153528

Offset

0,4

Links

Table of n, a(n) for n=0..4.

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

Adjacent sequences: A191936 A191937 A191938 * A191940 A191941 A191942

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 19 2011

Status

approved