A216036 Number of isomorphism classes of stretchable simplicial arrangements of n pseudolines in the real projective plane.

0, 0, 0, 0, 1, 1, 1, 1, 3, 1, 3, 4, 4, 5, 7, 8, 8, 7, 5, 7, 5, 2, 4, 8, 4, 4

Offset

2,9

Comments

Near-pencil arrangements are excluded.

Links

Table of n, a(n) for n=2..27.

M. Cuntz, Simplicial Arrangements with up to 27 Lines, arXiv:1108.3000 [math.CO], 2011.

M. Cuntz, Simplicial Arrangements with up to 27 Lines, Discrete Comput. Geom. 48 (2012), no. 3, 682--701. MR2957638.

Crossrefs

Cf. A216036, A216038.

Sequence in context: A175290 A089958 A162932 * A008924 A175186 A021323

Adjacent sequences: A216033 A216034 A216035 * A216037 A216038 A216039

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 30 2012

Status

approved