Inverse Euler transform of the unsigned Moebius function A008966.

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =-1a(5) =1a(6) =0a(7) =0a(8) =-1a(9) =1a(10) =0a(11) =0a(12) =-2a(13) =3a(14) =0a(15) =-1a(16) =-3a(17) =6a(18) =-3a(19) =0a(20) =-6a(21) =12a(22) =-6a(23) =0a(24) =-9a(25) =23a(26) =-17a(27) =0a(28) =-15a(29) =47