id:A006643 - OEIS Search Results

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Class number of quadratic field with discriminant -4n and n runs through numbers congruent to 1 or 2 mod 4.
(Formerly M0225)

+0
2

1, 1, 2, 2, 2, 2, 4, 4, 4, 2, 6, 6, 4, 4, 4, 2, 6, 8, 4, 4, 6, 4, 2, 6, 8, 8, 8, 8, 4, 4, 10, 8, 4, 4, 4, 10, 12, 4, 8, 4, 14, 4, 8, 6, 6, 12, 8, 8, 6, 10, 12, 4, 4, 14, 8, 8, 8, 4, 8, 16, 14, 8, 6, 8, 16, 8, 10, 12 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.`
	CROSSREFS	`Cf. A006642.` `Sequence in context: A096094 A052273 A074912 this_sequence A080217 A072376 A131883` `Adjacent sequences: A006640 A006641 A006642 this_sequence A006644 A006645 A006646`
	KEYWORD	`nonn,more`
	AUTHOR	`njas, Mira Bernstein (mira(AT)math.berkeley.edu)`

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

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