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

Terms

a(0) =0a(1) =0a(2) =2a(3) =3a(4) =0a(5) =11a(6) =0a(7) =17a(8) =15a(9) =14a(10) =51a(11) =11a(12) =77a(13) =35a(14) =103a(15) =131a(16) =160a(17) =227a(18) =330a(19) =218a(20) =426a(21) =794a(22) =426a(23) =1533a(24) =641a(25) =2072a(26) =2071a(27) =2491a(28) =4381a(29) =3880