a(n) = a(n-1) + the number of primes <= a(n-1).

Terms

a(0) =2a(1) =3a(2) =5a(3) =8a(4) =12a(5) =17a(6) =24a(7) =33a(8) =44a(9) =58a(10) =74a(11) =95a(12) =119a(13) =149a(14) =184a(15) =226a(16) =274a(17) =332a(18) =399a(19) =477a(20) =568a(21) =671a(22) =792a(23) =930a(24) =1088a(25) =1269a(26) =1474a(27) =1707a(28) =1973a(29) =2271