Expansion of Product_{k>=1} 1/(1 - mu(k)*x^k), where mu() is the Möbius function (A008683).

Terms

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