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A260991 Numbers n such that the modular curve X_0(n) has a bielliptic involution of Atkin-Lehner type. 4
22, 26, 28, 30, 33, 34, 35, 37, 38, 39, 40, 42, 43, 44, 45, 48, 50, 51, 53, 54, 55, 56, 60, 61, 62, 63, 64, 65, 69, 75, 79, 81, 83, 89, 92, 94, 95, 101, 119, 131 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Francesc Bars, Bielliptic Modular Curves, Journal of Number Theory, 76 (1999), 154-165.
CROSSREFS
Same as A260990 except that now 72 is excluded.
Sequence in context: A352158 A124177 A260990 * A160078 A066059 A084891
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Aug 08 2015, following a suggestion from Roger L. Bagula, Jul 22 2015
STATUS
approved

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Last modified March 28 11:59 EDT 2024. Contains 371247 sequences. (Running on oeis4.)