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%I #16 Aug 10 2015 03:12:28
%S 22,26,28,30,33,34,35,37,38,39,40,42,43,44,45,48,50,51,53,54,55,56,60,
%T 61,62,63,64,65,69,75,79,81,83,89,92,94,95,101,119,131
%N Numbers n such that the modular curve X_0(n) has a bielliptic involution of Atkin-Lehner type.
%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 Same as A260990 except that now 72 is excluded.
%Y Cf. A260992, A260993, A260994.
%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