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A003650 Class number of real quadratic field with discriminant 4n+1.
(Formerly M0055)
+0
2
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 3, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 3, 1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 1, 1, 5, 1, 1, 1, 1, 2, 1, 1, 4, 1, 1, 1, 1, 2, 3, 3, 2, 2, 1, 2, 1, 1, 4, 1, 1, 1 (list; graph; listen)
OFFSET

1,12

REFERENCES

D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.

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

CROSSREFS

Cf. A003651.

Sequence in context: A154843 A062557 A003649 this_sequence A059233 A143898 A101873

Adjacent sequences: A003647 A003648 A003649 this_sequence A003651 A003652 A003653

KEYWORD

nonn

AUTHOR

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

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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