cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A076912 Number of degree-n rational curves on a general quintic threefold.

Original entry on oeis.org

5, 2875, 609250, 317206375, 242467530000, 229305888887625, 248249742118022000, 295091050570845659250, 375632160937476603550000, 503840510416985243645106250, 704288164978454686113382643750
Offset: 0

Views

Author

N. J. A. Sloane, Nov 28 2002

Keywords

Examples

			a(1) = 2875 = number of lines in the quintic.
		

References

  • J. Bertin and C. Peters, Variations of Hodge structure ..., pp. 151-232 of J. Bertin et al., eds., Introduction to Hodge Theory, Amer. Math. Soc. and Soc. Math. France, 2002; see p. 220.
  • D. A. Cox and S. Katz, Mirror Symmetry and Algebraic Geometry, Amer. Math. Soc., 1999.
  • Ellingsrud, Geir and Stromme, Stein Arild, The number of twisted cubic curves on the general quintic threefold (preliminary version). In Essays on Mirror Manifolds, 181-222, Int. Press, Hong Kong, 1992.

Crossrefs

Coincides with A060041 for n <= 9, but not for n = 10.

Extensions

a(10) = A060041(10) - 6 * 17601000 added by Andrey Zabolotskiy, Sep 10 2022 (see Encyclopedia of Mathematics, Clemens' conjecture)

A076910 Coefficients of 5-point function in dimension 5.

Original entry on oeis.org

7, 3727381, 2637885990187, 1927092954108108787, 1425153551321014327663291, 1060347883438857662557634869906, 791661306374088776109692880989252173, 592348256908461616176898022359492565546566, 443865568545713063761643598030194801299861575595, 332947403131697202086626568381790256001850741509664373
Offset: 0

Views

Author

N. J. A. Sloane, Nov 28 2002

Keywords

Crossrefs

Extensions

a(7)-a(9) from Greene et al. added by Andrey Zabolotskiy, Sep 11 2022
Showing 1-2 of 2 results.