Sum of the first n safe primes.

Terms

a(0) =5a(1) =12a(2) =23a(3) =46a(4) =93a(5) =152a(6) =235a(7) =342a(8) =509a(9) =688a(10) =915a(11) =1178a(12) =1525a(13) =1884a(14) =2267a(15) =2734a(16) =3213a(17) =3716a(18) =4279a(19) =4866a(20) =5585a(21) =6424a(22) =7287a(23) =8174a(24) =9157a(25) =10176a(26) =11363a(27) =12646a(28) =13953a(29) =15272