A168393 Moebius function of interprimes (A024675).

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

Offset: 1

Author

Jani Melik, Nov 24 2009

Keywords

• sign

Crossrefs

Cf. A008683.

Programs

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);