id:A079531 - OEIS Search Results

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a(n) = phi(n) - ceiling(n^(2/3)).

+0
5

0, -1, -1, -1, 1, -2, 2, 0, 1, -1, 5, -2, 6, 0, 1, 1, 9, -1, 10, 0, 4, 2, 13, -1, 11, 3, 9, 2, 18, -2, 20, 5, 9, 5, 13, 1, 24, 6, 12, 4, 28, -1, 29, 7, 11, 9, 32, 2, 28, 6, 18, 10, 37, 3, 25, 9, 21, 13, 42, 0, 44, 14, 20, 16, 31, 3, 49, 15, 27, 7, 52, 6, 54, 18, 22, 18, 41, 5, 59, 13, 35, 21, 62, 4, 44, 22 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`a(n) >= 0 for n > 30.`
	REFERENCES	`D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 9.`
	CROSSREFS	`Cf. A000010, A079530, A079532, A079534.` `Sequence in context: A112555 A108561 A104579 this_sequence A134178 A059018 A122190` `Adjacent sequences: A079528 A079529 A079530 this_sequence A079532 A079533 A079534`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jan 23 2003`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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