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A070306 a(n)=2phi(n)/2^omega(n). +0
2
1, 2, 2, 4, 1, 6, 4, 6, 2, 10, 2, 12, 3, 4, 8, 16, 3, 18, 4, 6, 5, 22, 4, 20, 6, 18, 6, 28, 2, 30, 16, 10, 8, 12, 6, 36, 9, 12, 8, 40, 3, 42, 10, 12, 11, 46, 8, 42, 10, 16, 12, 52, 9, 20, 12, 18, 14, 58, 4, 60, 15, 18, 32, 24, 5, 66, 16, 22, 6, 70, 12, 72, 18, 20, 18, 30, 6, 78, 16 (list; graph; listen)
OFFSET

2,2

COMMENT

Always an integer.

LINKS

S. R. Finch and Pascal Sebah, Squares and Cubes Modulo n (arXiv:math.NT/0604465).

PROGRAM

(PARI) for(n=2, 100, print1(2*eulerphi(n)/2^omega(n), ", "))

CROSSREFS

Sequence in context: A116588 A069922 A072211 this_sequence A014665 A055035 A152593

Adjacent sequences: A070303 A070304 A070305 this_sequence A070307 A070308 A070309

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 12 2002

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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