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A238370 Number of rational curves on S of degree d passing through d-1 general points, where S is a general cubic surface in projective 3-space. 1
27, 27, 72, 216, 459, 936 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Finding a recursive formula (à la Kontsevich for A013587?) remains open.

The famous 27 lines on a cubic surface is the case a(1) = 27. - Michael Somos, Feb 25 2014

LINKS

Table of n, a(n) for n=1..6.

Steven R. Finch, Enumerative geometry, February 24, 2014. [Cached copy, with permission of the author]

W. Traves, Conics on the cubic surface, MAAC 2004, George Mason University.

CROSSREFS

Cf. A013587, A027363.

Sequence in context: A164862 A040703 A022361 * A056131 A253102 A165848

Adjacent sequences:  A238367 A238368 A238369 * A238371 A238372 A238373

KEYWORD

nonn,more

AUTHOR

Steven Finch, Feb 25 2014

STATUS

approved

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Last modified November 12 17:06 EST 2019. Contains 329058 sequences. (Running on oeis4.)