id:A003647 - OEIS Search Results

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Class number of real quadratic forms with discriminant 4n+1.
(Formerly M0084)

+0
2

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

	OFFSET	`1,4`
	REFERENCES	`D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.`
	CROSSREFS	`Cf. A003648.` `Sequence in context: A131718 A131017 A049046 this_sequence A084217 A025903 A101211` `Adjacent sequences: A003644 A003645 A003646 this_sequence A003648 A003649 A003650`
	KEYWORD	`nonn`
	AUTHOR	`njas, Mira Bernstein`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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