id:A003639 - OEIS Search Results

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Number of classes per genus in Q(sqrt -n), n square-free.
(Formerly M0085)

+0
1

1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 3, 3, 3, 1, 3, 1, 2, 1, 1, 3, 2, 4, 1, 1, 2, 5, 1, 3, 2, 1, 1, 3, 3, 4, 2, 2, 1, 2, 1, 7, 2, 5, 2, 1, 5, 2, 3, 1, 5, 3, 6, 1, 1, 4, 4, 2, 7, 1, 5, 1, 3, 3, 3, 3, 4, 4, 2, 1, 3, 5, 5, 1, 5, 3, 1, 5, 1, 7, 4, 2, 3, 2, 2, 5, 2, 8, 7, 7, 2, 2, 3, 4, 5, 4, 1, 1, 5, 11, 3 (list; graph; listen)

	OFFSET	`1,10`
	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	`Sequence in context: A175023 A128115 A091318 this_sequence A061916 A076348 A113310` `Adjacent sequences: A003636 A003637 A003638 this_sequence A003640 A003641 A003642`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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