Dirichlet inverse of A326042, where A326042(n) = A064989(sigma(A003961(n))).

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =-10a(4) =-1a(5) =2a(6) =-2a(7) =18a(8) =-25a(9) =1a(10) =-5a(11) =20a(12) =-4a(13) =2a(14) =2a(15) =46a(16) =-3a(17) =25a(18) =-2a(19) =10a(20) =4a(21) =5a(22) =-6a(23) =-36a(24) =-33a(25) =4a(26) =86a(27) =20a(28) =-1a(29) =-2