Sum of first n semiprimes.

Terms

a(0) =4a(1) =10a(2) =19a(3) =29a(4) =43a(5) =58a(6) =79a(7) =101a(8) =126a(9) =152a(10) =185a(11) =219a(12) =254a(13) =292a(14) =331a(15) =377a(16) =426a(17) =477a(18) =532a(19) =589a(20) =647a(21) =709a(22) =774a(23) =843a(24) =917a(25) =994a(26) =1076a(27) =1161a(28) =1247a(29) =1334