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A168394 Moebius function of even interprimes (A072568). 0
1, 0, 0, 1, -1, 1, -1, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, 1, -1, 0, 0, -1, 0, -1, 0, 0, -1, 0, 0, 0, 0, 0, -1, 1, 0, -1, 0, 1, -1, 0, 0, 0, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, -1, 0, 0, 1, 1, -1, 0, 0, 0, 0, 0, 1, 1, -1, -1, -1, 0, 0, 0, -1, -1, 0, -1, 0, 0, 0, 0, 0, 1, -1, 0, -1, 0, 0, 0, 0, -1, 0, -1, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..94.

MAPLE

ts_fip_sod:=proc(n) local i, an, tren: an:=[ ]: for i from 2 to n do tren:=(ithprime(i)+ithprime(i+1))/2: if (tren mod 2 = 0) then an:=[ op(an), numtheory[mobius](tren) ]: fi: od: RETURN(an) end: ts_fip_sod(1000);

CROSSREFS

Cf. A008683.

Sequence in context: A267810 A267927 A030300 * A072770 A071674 A090172

Adjacent sequences:  A168391 A168392 A168393 * A168395 A168396 A168397

KEYWORD

sign

AUTHOR

Jani Melik, Nov 24 2009

STATUS

approved

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Last modified June 15 20:50 EDT 2019. Contains 324145 sequences. (Running on oeis4.)