id:A003637 - OEIS Search Results

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Number of classes per genus in quadratic field with discriminant -4n+1.
(Formerly M2263)

+0
2

1, 1, 1, 1, 1, 3, 3, 1, 2, 1, 5, 1, 2, 3, 1, 7, 5, 3, 3, 1, 4, 5, 3, 4, 1, 5, 1, 5, 5, 3, 5, 7, 2, 5, 1, 11, 5, 4, 1, 13, 1, 9, 2, 3, 7, 2, 7, 5, 3, 1, 15, 3, 7, 3, 2, 13, 1, 11, 3, 7, 2, 4, 4, 5, 3, 19, 5, 2, 6, 3, 9, 3, 5, 2, 19, 9, 4, 3, 17, 7, 4, 4, 1, 8, 3, 5, 9, 1, 21, 1, 15, 5, 7, 3, 5, 7, 7, 8, 25 (list; graph; listen)

	OFFSET	`1,6`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).` `D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.`
	CROSSREFS	`Cf. A003638.` `Sequence in context: A100940 A063421 A073067 this_sequence A110628 A107292 A004550` `Adjacent sequences: A003634 A003635 A003636 this_sequence A003638 A003639 A003640`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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