Partial sums of the sequence (A001097) of twin primes.

Terms

a(0) =3a(1) =8a(2) =15a(3) =26a(4) =39a(5) =56a(6) =75a(7) =104a(8) =135a(9) =176a(10) =219a(11) =278a(12) =339a(13) =410a(14) =483a(15) =584a(16) =687a(17) =794a(18) =903a(19) =1040a(20) =1179a(21) =1328a(22) =1479a(23) =1658a(24) =1839a(25) =2030a(26) =2223a(27) =2420a(28) =2619a(29) =2846