A191937 Number of simple arrangements of pseudolines of order n.

1, 1, 1, 13, 6570, 181403533

Offset

0,4

Links

Table of n, a(n) for n=0..5.

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: A032463 A298273 A203585 * A210157 A213410 A013524

Adjacent sequences: A191934 A191935 A191936 * A191938 A191939 A191940

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 19 2011

Status

approved