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Numbers n such that the modular curve X_0(n) has genus >= 2 and contains infinitely many points of degree 2 over some number field L.
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%I #11 Aug 10 2015 03:11:45

%S 22,23,26,28,30,31,33,34,35,37,38,39,40,41,42,43,44,45,46,47,48,50,51,

%T 53,54,55,56,59,60,61,62,63,64,65,69,71,72,75,79,81,83,89,92,94,95,

%U 101,119,131

%N Numbers n such that the modular curve X_0(n) has genus >= 2 and contains infinitely many points of degree 2 over some number field L.

%H Francesc Bars, <a href="http://dx.doi.org/10.1006/jnth.1998.2343">Bielliptic Modular Curves</a>, Journal of Number Theory, 76 (1999), 154-165.

%Y Cf. A260990, A260991, A260992, A260993.

%K nonn,fini,full

%O 1,1

%A _N. J. A. Sloane_, Aug 08 2015, following a suggestion from _Roger L. Bagula_, Jul 22 2015