Möbius (or Moebius) function mu(n). mu(1) = 1; mu(n) = (-1)^k if n is the product of k different primes; otherwise mu(n) = 0.

A008683

Möbius (or Moebius) function mu(n). mu(1) = 1; mu(n) = (-1)^k if n is the product of k different primes; otherwise mu(n) = 0.

Terms

    a(0) =1a(1) =-1a(2) =-1a(3) =0a(4) =-1a(5) =1a(6) =-1a(7) =0a(8) =0a(9) =1a(10) =-1a(11) =0a(12) =-1a(13) =1a(14) =1a(15) =0a(16) =-1a(17) =0a(18) =-1a(19) =0a(20) =1a(21) =1a(22) =-1a(23) =0a(24) =0a(25) =1a(26) =0a(27) =0a(28) =-1a(29) =-1

External references