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A192322
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Negated discriminants of imaginary quadratic number fields whose class group is isomorphic to the Klein 4-group, C2 x C2.
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4
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84, 120, 132, 168, 195, 228, 280, 312, 340, 372, 408, 435, 483, 520, 532, 555, 595, 627, 708, 715, 760, 795, 1012, 1435
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OFFSET
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1,1
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COMMENTS
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Added keyword "full" - This sequence is a subsequence of A013658, whose last term is 1555. I have verified that the terms above are complete and correct. - Rick L. Shepherd, May 06 2013
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LINKS
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PROG
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(PARI) ok(n)={isfundamental(-n) && [2, 2] == quadclassunit(-n).cyc} \\ Andrew Howroyd, Jul 20 2018
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CROSSREFS
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KEYWORD
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nonn,fini,full
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AUTHOR
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STATUS
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approved
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