id:A065357 - OEIS Search Results

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(-1)^pi(n) where pi(n) is the number of primes <= n.

+0
3

1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 1, 1 (list; graph; listen)

	OFFSET	`0,1`
	CROSSREFS	`Cf. A000720.` `Sequence in context: A122188 A130151 A131561 this_sequence A071935 A096809 A110515` `Adjacent sequences: A065354 A065355 A065356 this_sequence A065358 A065359 A065360`
	KEYWORD	`easy,sign`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Oct 31 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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