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A046085
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Numbers n such that Q(sqrt(-n)) has class number 4.
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5
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14, 17, 21, 30, 33, 34, 39, 42, 46, 55, 57, 70, 73, 78, 82, 85, 93, 97, 102, 130, 133, 142, 155, 177, 190, 193, 195, 203, 219, 253, 259, 291, 323, 355, 435, 483, 555, 595, 627, 667, 715, 723, 763, 795, 955, 1003, 1027, 1227, 1243, 1387, 1411, 1435
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Contains 54 numbers [Arno, Theorem 7], ..., 1387, 1411, 1435, 1507 and 1555. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 01 2010]
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LINKS
| Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences related to quadratic fields
Steven Arno, The imaginary quadratic fields of class number 4, Acta Arithm. vol 60 issue 4 (1991). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 01 2010]
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PROG
| For PARI code see A005847
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CROSSREFS
| See A003173, A005847, A006203, A046085, A046002, A055109, A046004, A055110, A046006, A055111 for class numbers 1 through 10.
Sequence in context: A015877 A192290 A152010 * A054296 A155704 A105189
Adjacent sequences: A046082 A046083 A046084 * A046086 A046087 A046088
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KEYWORD
| nonn,fini
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 16 2000
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