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A364712 Number of families of non-toric log del Pezzo surfaces of Picard number one with Gorenstein index = n that admit an effective action of a one-dimensional torus. 1
13, 10, 36, 25, 80, 37, 100, 56, 109, 71, 176, 85, 158, 105, 200, 102, 226, 102, 241, 178, 253, 150, 312, 176, 269, 149, 336, 224, 395, 192, 309, 216, 381, 207, 592, 230, 336, 239, 497, 312, 481, 266, 405, 348, 526, 270, 549, 317, 497, 277, 570, 354, 532, 334 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
This sequence appears in Proposition 7.1, p. 27 of Haettig, Hafner, Hausen and Springer.
LINKS
Daniel Haettig, Beatrice Hafner, Juergen Hausen and Justus Springer, Del Pezzo surfaces of Picard number one admitting a torus action, arXiv:2207.14790 [math.AG], 2022.
Daniel Hättig, Jürgen Hausen, Justus Springer and Hendrik Süß, Log del Pezzo surfaces with torus action - a searchable database
CROSSREFS
Sequence in context: A180864 A206608 A094813 * A152298 A158956 A259663
KEYWORD
nonn
AUTHOR
Justus Springer, Aug 04 2023
STATUS
approved

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Last modified March 4 16:16 EST 2024. Contains 370532 sequences. (Running on oeis4.)