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A106480 Row sums of inverse of sequence array for Euler phi function. 1
1, 0, -1, 0, -1, 2, -1, -2, 5, -4, 1, 0, -7, 18, -9, -12, 17, -24, 31, 6, -67, 94, -49, -60, 157, -230, 217, 118, -619, 758, -461, -252, 1509, -2490, 1867, 780, -4531, 6932, -5543, -820, 11885, -21248, 17591, 2586, -32415, 58070, -54325, -56 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..47.

FORMULA

G.f.: 1/(sum{j>=0, phi(j+1)x^j}(1-x))

CROSSREFS

Sequence in context: A025165 A212431 A318354 * A099602 A151703 A151691

Adjacent sequences:  A106477 A106478 A106479 * A106481 A106482 A106483

KEYWORD

easy,sign

AUTHOR

Paul Barry, May 03 2005

STATUS

approved

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Last modified February 21 04:18 EST 2019. Contains 320371 sequences. (Running on oeis4.)