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A046018
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Discriminants of imaginary quadratic fields with class number 21 (negated).
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5
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431, 503, 743, 863, 1931, 2503, 2579, 2767, 2819, 3011, 3371, 4283, 4523, 4691, 5011, 5647, 5851, 5867, 6323, 6691, 7907, 8059, 8123, 8171, 8243, 8387, 8627, 8747, 9091, 9187, 9811, 9859, 10067, 10771, 11731, 12107, 12547, 13171, 13291
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| Buell, D. A. ``Small Class Numbers and Extreme Values of L-Functions of Quadratic Fields.'' Math. Comput. 139, 786-796, 1977.
Wagner, C. ``Class Number 5, 6 and 7.'' Math. Comput. 65, 785-800, 1996.
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LINKS
| S. Arno, M. L. Robinson and F. S. Wheller, Imaginary Quadratic Fields with Small Odd Class Number
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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CROSSREFS
| Cf. A006203, A013658, A014602, A014603, A046002, ..., A046020.
Sequence in context: A203545 A176387 A160518 * A142802 A003548 A179173
Adjacent sequences: A046015 A046016 A046017 * A046019 A046020 A046021
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KEYWORD
| nonn,fini
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
| 85 discriminants in this sequence (proved).
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