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A117295 a(n)=phi(n)*(n-phi(n)) 0
0, 1, 2, 4, 4, 8, 6, 16, 18, 24, 10, 32, 12, 48, 56, 64, 16, 72, 18, 96, 108, 120, 22, 128, 100, 168, 162, 192, 28, 176, 30, 256, 260, 288, 264, 288, 36, 360, 360, 384, 40, 360, 42, 480, 504, 528, 46, 512, 294, 600, 608, 672, 52, 648, 600, 768, 756, 840, 58, 704, 60 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

EXAMPLE

a(8)=phi(8)*(8-phi(8))=4*4=16

CROSSREFS

Sequence in context: A184396 A077764 A110794 * A093820 A095400 A098820

Adjacent sequences:  A117292 A117293 A117294 * A117296 A117297 A117298

KEYWORD

nonn

AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 23 2006

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Last modified February 15 09:26 EST 2012. Contains 205753 sequences.