G.f.: Product_{k>=1} 1/(1+prime(k)*x^prime(k)).

Terms

a(0) =1a(1) =0a(2) =-2a(3) =-3a(4) =4a(5) =1a(6) =1a(7) =-9a(8) =13a(9) =-9a(10) =20a(11) =-38a(12) =76a(13) =-75a(14) =65a(15) =-323a(16) =378a(17) =-197a(18) =805a(19) =-1394a(20) =1635a(21) =-2513a(22) =3175a(23) =-5442a(24) =11135a(25) =-12570a(26) =12526a(27) =-33357a(28) =51563a(29) =-46460