a(n) = a(n-1) + prime(n-1), with a(1)=2.

Terms

a(0) =2a(1) =4a(2) =7a(3) =12a(4) =19a(5) =30a(6) =43a(7) =60a(8) =79a(9) =102a(10) =131a(11) =162a(12) =199a(13) =240a(14) =283a(15) =330a(16) =383a(17) =442a(18) =503a(19) =570a(20) =641a(21) =714a(22) =793a(23) =876a(24) =965a(25) =1062a(26) =1163a(27) =1266a(28) =1373a(29) =1482