A216036 - OEIS

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A216036

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

2

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

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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