A145581 Number of isomorphism classes of toric log del Pezzo surfaces with index L = n.

16, 30, 99, 91, 250, 379, 429, 307, 690, 916, 939, 1279, 1142, 1545, 4312, 1030, 1892

Offset

1,1

Comments

A145582(n) is the number of rank one toric log del Pezzo surfaces with index L = n. Both are in the table for Theorem 1.2, p. 4 of Kasprzyk, Kreuzer and Nill.

Links

Table of n, a(n) for n=1..17.

Dimitrios I. Dais, On the Twelve-Point Theorem for l-Reflexive Polygons, arXiv:1806.08351 [math.CO], 2018.

Alexander M. Kasprzyk, Maximilian Kreuzer and Benjamin Nill, On the combinatorial classification of toric log del Pezzo surfaces, arXiv:0810.2207 [math.AG], 2008.

Crossrefs

Cf. A145582.

Sequence in context: A255265 A183372 A308026 * A186453 A129617 A221257

Adjacent sequences: A145578 A145579 A145580 * A145582 A145583 A145584

Keyword

nonn

Author

Jonathan Vos Post, Oct 14 2008

Extensions

a(17) from Danny Rorabaugh, Jun 22 2018

Status

approved