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A165872 Totally multiplicative sequence with a(p) = - 2. 0
1, -2, -2, 4, -2, 4, -2, -8, 4, 4, -2, -8, -2, 4, 4, 16, -2, -8, -2, -8, 4, 4, -2, 16, 4, 4, -8, -8, -2, -8, -2, -32, 4, 4, 4, 16, -2, 4, 4, 16, -2, -8, -2, -8, -8, 4, -2, -32, 4, -8 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

The Dirichlet series are product_{prime p} 1/(1+2/p^s), related to the Feller-Tornier constants like A065474. - R. J. Mathar, Feb 07 2011

FORMULA

a(n) = A122803(A001222(n)) = (-2)^bigomega(n) = (-2)^A001222(n). Abs(a(n)) = A061142(n)

CROSSREFS

Sequence in context: A055155 A085191 A188581 * A061142 A182730 A152858

Adjacent sequences:  A165869 A165870 A165871 * A165873 A165874 A165875

KEYWORD

sign,mult

AUTHOR

Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Sep 28 2009

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Last modified February 15 03:22 EST 2012. Contains 205694 sequences.