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A074763 1/n*Sum_{d divides n} (-1)^(n+d)*phi(n/d)*2^d. 0
2, 1, 4, 4, 8, 10, 20, 34, 60, 100, 188, 348, 632, 1162, 2192, 4114, 7712, 14542, 27596, 52480, 99880, 190558, 364724, 699248, 1342184, 2580796, 4971068, 9587560, 18512792, 35790376, 69273668, 134219794, 260301176, 505286416, 981706832 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Cf. A000010, A000031, A038063.

Sequence in context: A008312 A060723 A195691 * A099932 A175000 A008346

Adjacent sequences:  A074760 A074761 A074762 * A074764 A074765 A074766

KEYWORD

nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 06 2002

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Last modified February 14 17:44 EST 2012. Contains 205651 sequences.