Sum of odd-indexed primes.

Terms

a(0) =2a(1) =7a(2) =18a(3) =35a(4) =58a(5) =89a(6) =130a(7) =177a(8) =236a(9) =303a(10) =376a(11) =459a(12) =556a(13) =659a(14) =768a(15) =895a(16) =1032a(17) =1181a(18) =1338a(19) =1505a(20) =1684a(21) =1875a(22) =2072a(23) =2283a(24) =2510a(25) =2743a(26) =2984a(27) =3241a(28) =3510a(29) =3787