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A216038 Number of isomorphism classes of unstretchable simplicial arrangements of n pseudolines in the real projective plane that satisfy Pappus's theorem. 2
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 (list; graph; refs; listen; history; text; internal format)
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: A297044 A296213 A277161 * A011728 A297043 A133010

Adjacent sequences:  A216035 A216036 A216037 * A216039 A216040 A216041

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 30 2012

STATUS

approved

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Last modified August 22 20:47 EDT 2019. Contains 326209 sequences. (Running on oeis4.)