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A053574 Exponent of 2 in phi(n) where phi(n)=A000010(n). 1
0, 0, 1, 1, 2, 1, 1, 2, 1, 2, 1, 2, 2, 1, 3, 3, 4, 1, 1, 3, 2, 1, 1, 3, 2, 2, 1, 2, 2, 3, 1, 4, 2, 4, 3, 2, 2, 1, 3, 4, 3, 2, 1, 2, 3, 1, 1, 4, 1, 2, 5, 3, 2, 1, 3, 3, 2, 2, 1, 4, 2, 1, 2, 5, 4, 2, 1, 5, 2, 3, 1, 3, 3, 2, 3, 2, 2, 3, 1, 5, 1, 3, 1, 3, 6, 1, 3, 3, 3, 3, 3, 2, 2, 1, 3, 5, 5, 1, 2, 3, 2, 5, 1, 4, 4 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

EXAMPLE

n=513=27*19 phi(513)=4*81 so power of 2 is 2, thus a(513)=2

PROG

(Pari) vector(66, n, valuation(eulerphi(n), 2)) /* Joerg Arndt, Apr 22 2011 */

CROSSREFS

Cf. A000010.

Sequence in context: A103684 A105103 A086669 * A065203 A029396 A084746

Adjacent sequences:  A053571 A053572 A053573 * A053575 A053576 A053577

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Jan 18 2000

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Last modified February 15 09:10 EST 2012. Contains 205747 sequences.