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.

27, 27, 72, 216, 459, 936

Offset: 1

Author

Steven Finch, Feb 25 2014

Keywords

• nonn
• more

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

• 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.