id:A070633 - OEIS Search Results

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Number of k>0 such that phi(k) divides n.

+0
1

2, 5, 2, 9, 2, 9, 2, 14, 2, 7, 2, 19, 2, 5, 2, 20, 2, 13, 2, 16, 2, 7, 2, 34, 2, 5, 2, 11, 2, 13, 2, 27, 2, 5, 2, 31, 2, 5, 2, 30, 2, 13, 2, 14, 2, 7, 2, 51, 2, 7, 2, 11, 2, 15, 2, 19, 2, 7, 2, 37, 2, 5, 2, 35, 2, 13, 2, 9, 2, 9, 2, 63, 2, 5, 2, 9, 2, 11, 2, 46, 2, 7, 2, 31, 2, 5, 2, 25, 2, 17, 2 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(n=1, 120, print1(sum(i=1, 100*n, if(n%eulerphi(i), 0, 1)), ", "))`
	CROSSREFS	`Cf. A014197.` `Sequence in context: A134349 A131711 A131201 this_sequence A119764 A085020 A102469` `Adjacent sequences: A070630 A070631 A070632 this_sequence A070634 A070635 A070636`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 13 2002`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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