a(n) is the coefficient of x^n in the polynomial given by Product_{k>=1} (1 + prime(k)*x^k).

Terms

a(0) =1a(1) =2a(2) =3a(3) =11a(4) =17a(5) =40a(6) =86a(7) =153a(8) =283a(9) =547a(10) =1069a(11) =1737a(12) =3238a(13) =5340a(14) =9574a(15) =17251a(16) =27897a(17) =45845a(18) =78601a(19) =126725a(20) =207153a(21) =353435a(22) =550422a(23) =881454a(24) =1393870a(25) =2239938a(26) =3473133a(27) =5546789a(28) =8762663a(29) =13341967