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A106479 First column in inverse of Euler phi sequence matrix. 2
1, -1, -1, 1, -1, 3, -3, -1, 7, -9, 5, -1, -7, 25, -27, -3, 29, -41, 55, -25, -73, 161, -143, -11, 217, -387, 447, -99, -737, 1377, -1219, 209, 1761, -3999, 4357, -1087, -5311, 11463, -12475, 4723, 12705, -33133, 38839, -15005, -35001, 90485, -112395, 54269, 92435, -262555, 328759, -165839, -244533 (list; graph; refs; listen; history; internal format)
OFFSET

0,6

FORMULA

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

CROSSREFS

Sequence in context: A084144 A180735 A116401 * A114422 A127501 A181304

Adjacent sequences:  A106476 A106477 A106478 * A106480 A106481 A106482

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 03 2005

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Last modified February 17 09:41 EST 2012. Contains 206009 sequences.