Dirichlet inverse of sigma_3 function (A001158).

Terms

a(0) =1a(1) =-9a(2) =-28a(3) =8a(4) =-126a(5) =252a(6) =-344a(7) =0a(8) =27a(9) =1134a(10) =-1332a(11) =-224a(12) =-2198a(13) =3096a(14) =3528a(15) =0a(16) =-4914a(17) =-243a(18) =-6860a(19) =-1008a(20) =9632a(21) =11988a(22) =-12168a(23) =0a(24) =125a(25) =19782a(26) =0a(27) =-2752a(28) =-24390a(29) =-31752