Product_{n>=1} 1 / (1 - a(n)*x^n) = 1 + Sum_{n>=1} mu(n)*x^n, where mu = A008683.

Terms

a(0) =1a(1) =-2a(2) =0a(3) =-3a(4) =-1a(5) =4a(6) =-4a(7) =-4a(8) =-7a(9) =14a(10) =-10a(11) =-2a(12) =-5a(13) =6a(14) =19a(15) =-102a(16) =70a(17) =-95a(18) =138a(19) =-314a(20) =174a(21) =48a(22) =-70a(23) =-156a(24) =-797a(25) =2028a(26) =-2048a(27) =1989a(28) =-3479a(29) =4277