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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

%I

%S 27,27,72,216,459,936

%N 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.

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

%C The famous 27 lines on a cubic surface is the case a(1) = 27. - _Michael Somos_, Feb 25 2014

%H Steven R. Finch, <a href="/A013587/a013587.pdf">Enumerative geometry</a>, February 24, 2014. [Cached copy, with permission of the author]

%H W. Traves, <a href="http://www.usna.edu/Users/math/traves/presentations/MAAC2004print.pdf">Conics on the cubic surface</a>, MAAC 2004, George Mason University.

%Y Cf. A013587, A027363.

%K nonn,more

%O 1,1

%A _Steven Finch_, Feb 25 2014

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Last modified April 9 20:55 EDT 2020. Contains 333363 sequences. (Running on oeis4.)