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A070633 Number of k>0 such that phi(k) divides n. 0
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; refs; listen; history; internal format)
OFFSET

1,1

PROG

(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 * A119764 A178310 A085020

Adjacent sequences:  A070630 A070631 A070632 * A070634 A070635 A070636

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 13 2002

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.