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Search: id:A006203
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| A006203 |
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Discriminants of imaginary quadratic fields with class number 3 (negated).
(Formerly M5131)
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+0
31
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| 23, 31, 59, 83, 107, 139, 211, 283, 307, 331, 379, 499, 547, 643, 883, 907
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Also n such that Q(sqrt(-n)) has class number 3.
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REFERENCES
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H. Cohen, Course in Computational Alg. No. Theory, Springer, 1993, p. 514.
J. M. Masley, Where are the number fields with small class number?, pp. 221-242 of Number Theory Carbondale 1979, Lect. Notes Math. 751 (1982).
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences related to quadratic fields
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PROGRAM
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For PARI code see A005847.
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CROSSREFS
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Cf. A013658, A014602, A014603, A046002, ..., A046020. Cf. also A003173, A005847, ...
Sequence in context: A064792 A030670 A030680 this_sequence A052160 A093014 A105007
Adjacent sequences: A006200 A006201 A006202 this_sequence A006204 A006205 A006206
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KEYWORD
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fini,nonn,full,nice
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AUTHOR
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njas
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