Sum of the first n primes whose indices are primes.

Terms

a(0) =3a(1) =8a(2) =19a(3) =36a(4) =67a(5) =108a(6) =167a(7) =234a(8) =317a(9) =426a(10) =553a(11) =710a(12) =889a(13) =1080a(14) =1291a(15) =1532a(16) =1809a(17) =2092a(18) =2423a(19) =2776a(20) =3143a(21) =3544a(22) =3975a(23) =4436a(24) =4945a(25) =5492a(26) =6055a(27) =6642a(28) =7241a(29) =7858