a(n) = (Sum of the first n primes) + n.

Terms

a(0) =3a(1) =7a(2) =13a(3) =21a(4) =33a(5) =47a(6) =65a(7) =85a(8) =109a(9) =139a(10) =171a(11) =209a(12) =251a(13) =295a(14) =343a(15) =397a(16) =457a(17) =519a(18) =587a(19) =659a(20) =733a(21) =813a(22) =897a(23) =987a(24) =1085a(25) =1187a(26) =1291a(27) =1399a(28) =1509a(29) =1623