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A168393 Moebius function of interprimes (A024675). 0
0, 1, 0, 0, 1, 0, 1, 1, -1, 1, 1, -1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, -1, -1, 0, 1, 0, 1, 1, -1, 0, 0, -1, 0, -1, -1, 0, 0, -1, 0, -1, 0, 1, 1, 0, 0, -1, 0, 0, -1, 1, 0, -1, 0, 1, 0, -1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 1, 1, 1, -1, 0, 0, 0, -1, 0, 0, 0, 1, 1, 0, 1, -1, 1, -1, 1, 0, 1, -1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..96.

MAPLE

ts_fip:=proc(n) local i, an: an:=[ ]: for i from 2 to n do an:=[ op(an), numtheory[mobius]((ithprime(i)+ithprime(i+1))/2) ]: od: RETURN(an) end: ts_fip(500);

CROSSREFS

Cf. A008683.

Sequence in context: A285411 A104893 A104894 * A071986 A079944 A059652

Adjacent sequences:  A168390 A168391 A168392 * A168394 A168395 A168396

KEYWORD

sign

AUTHOR

Jani Melik, Nov 24 2009

STATUS

approved

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Last modified June 17 07:00 EDT 2019. Contains 324183 sequences. (Running on oeis4.)