A216038 Number of isomorphism classes of unstretchable simplicial arrangements of n pseudolines in the real projective plane that satisfy Pappus's theorem.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0

Offset

2

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, A216037.

Sequence in context: A353677 A353676 A340370 * A011728 A297043 A355451

Adjacent sequences: A216035 A216036 A216037 * A216039 A216040 A216041

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 30 2012

Status

approved