A260993 Numbers n such that the modular curve X_0(n) contains infinitely many rational points of degree 2.

22, 23, 26, 28, 29, 30, 31, 33, 35, 37, 39, 40, 41, 43, 46, 47, 48, 50, 53, 59, 61, 65, 71, 79, 83, 89, 101, 131

Offset

1,1

Links

Table of n, a(n) for n=1..28.

Francesc Bars, Bielliptic Modular Curves, Journal of Number Theory, 76 (1999), 154-165.

Crossrefs

Cf. A260990, A260991, A260992, A260994.

Sequence in context: A092619 A092624 A254751 * A276182 A091404 A260994

Adjacent sequences: A260990 A260991 A260992 * A260994 A260995 A260996

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Aug 08 2015, following a suggestion from Roger L. Bagula, Jul 22 2015

Status

approved