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A003644 Discriminants of imaginary quadratic fields with 1 class per genus (a finite sequence).
(Formerly M2333)
+0
1
3, 4, 7, 8, 11, 15, 19, 20, 24, 35, 40, 43, 51, 52, 67, 84, 88, 91, 115, 120, 123, 132, 148, 163, 168, 187, 195, 228, 232, 235, 267, 280, 312, 340, 372, 403, 408, 420, 427, 435, 483, 520, 532, 555, 595, 627, 660, 708, 715, 760, 795, 840, 1012, 1092, 1155, 1320 (list; graph; listen)
OFFSET

1,1

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Z. I. Borevich and I. R. Shafarevich, Number Theory. Academic Press, NY, 1966, pp. 425-430.

L. E. Dickson, Introduction to the Theory of Numbers. Dover, NY, 1957, p. 85.

CROSSREFS

Sequence in context: A133675 A050122 A003657 this_sequence A033195 A107819 A050032

Adjacent sequences: A003641 A003642 A003643 this_sequence A003645 A003646 A003647

KEYWORD

nonn,fini,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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