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A002141
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Class numbers of quadratic fields.
(Formerly M3745 N1530)
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0
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1, 1, 5, 6, 7, 7, 9, 53, 60, 66, 83, 83, 136, 136, 185, 185, 185, 312, 312, 312, 3064, 3718, 3718, 3718, 8096, 9826, 12384, 16602, 16602, 16602, 16760, 16760, 182424, 323392, 323392, 323392, 323392
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,3
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REFERENCES
| D. H. Lehmer, E. Lehmer and D. Shanks, Integer sequences having prescribed quadratic character, Math. Comp., 24 (1970), 433-451.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| Index entries for sequences related to quadratic fields
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CROSSREFS
| Sequence in context: A139395 A029911 A205691 * A114547 A169869 A163508
Adjacent sequences: A002138 A002139 A002140 * A002142 A002143 A002144
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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