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A054586
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Sum_{d|2n+1} phi(d)*mu(d).
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0
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1, -1, -3, -5, -1, -9, -11, 3, -15, -17, 5, -21, -3, -1, -27, -29, 9, 15, -35, 11, -39, -41, 3, -45, -5, 15, -51, 27, 17, -57, -59, 5, 33, -65, 21, -69, -71, 3, 45, -77, -1, -81, 45, 27, -87, 55, 29, 51, -95, 9, -99, -101, -15, -105, -107, 35, -111, 63, 11, 75, -9
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| D. M. Burton, Elementary Number Theory, Allyn and Bacon Inc., Boston, MA, 1976. p. 152.
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FORMULA
| Multiplicative with a(p^e)=2-p. - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 25 2002
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PROG
| (PARI) j=[]; for(n=0, 200, j=concat(j, sumdiv(2*n+1, d, moebius(d)*eulerphi(d)))); j
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CROSSREFS
| Sequence in context: A112411 A021970 A115335 * A112752 A101035 A204029
Adjacent sequences: A054583 A054584 A054585 * A054587 A054588 A054589
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KEYWORD
| sign,mult
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Apr 12 2000
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