Product_{n>=1} (1 + x^n)^a(n) = 1 + x + Sum_{n>=2} prime(n-1) * x^n.

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =1a(5) =2a(6) =-1a(7) =1a(8) =-3a(9) =-1a(10) =4a(11) =1a(12) =5a(13) =2a(14) =-4a(15) =-4a(16) =-9a(17) =0a(18) =-3a(19) =14a(20) =19a(21) =4a(22) =6a(23) =-38a(24) =-27a(25) =-17a(26) =5a(27) =59a(28) =50a(29) =103