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A006203 Discriminants of imaginary quadratic fields with class number 3 (negated).
(Formerly M5131)
+0
31
23, 31, 59, 83, 107, 139, 211, 283, 307, 331, 379, 499, 547, 643, 883, 907 (list; graph; listen)
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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