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A260991
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Numbers n such that the modular curve X_0(n) has a bielliptic involution of Atkin-Lehner type.
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4
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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)
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OFFSET
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1,1
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LINKS
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CROSSREFS
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Same as A260990 except that now 72 is excluded.
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KEYWORD
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nonn,fini,full
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AUTHOR
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STATUS
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approved
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