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A039958 Class number of maximal order in real quadratic field of radicand n. +0
1
1, -1, 1, 2, -1, 1, 1, 2, 3, -2, 1, 2, -1, 1, 2, 4, -1, 3, 1, 2, 1, 1, 1, 2, 5, -2, 3, 2, -1, 2, 1, 4, 1, 2, 2, 6, -1, 1, 2, 2, -1, 2, 1, 2, 3, 1, 1, 4, 7, 5, 2, 2, -1, 3, 2, 2, 1, -2, 1, 2, -1, 1, 3, 8, -2, 2, 1, 2, 1, 2, 1, 6, -1, -2, 5, 2, 1, 2, 3, 4, 9, -4, 1, 2, -2, 1, 2, 2, -1, 3, 2, 2, 1, 1, 2, 4, -1, 7, 3, 10 (list; graph; listen)
OFFSET

1,4

REFERENCES

R. A. Mollin, Quadratics, CRC Press, 1996, Table C1.

CROSSREFS

Sequence in context: A035669 A126863 A106806 this_sequence A029344 A125769 A003023

Adjacent sequences: A039955 A039956 A039957 this_sequence A039959 A039960 A039961

KEYWORD

sign,easy,nice

AUTHOR

R. K. Guy (rkg(AT)cpsc.ucalgary.ca), N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

Mollin gives a table for n < 10000.

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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