The sum of the first n primes, minus n.

Terms

a(0) =1a(1) =3a(2) =7a(3) =13a(4) =23a(5) =35a(6) =51a(7) =69a(8) =91a(9) =119a(10) =149a(11) =185a(12) =225a(13) =267a(14) =313a(15) =365a(16) =423a(17) =483a(18) =549a(19) =619a(20) =691a(21) =769a(22) =851a(23) =939a(24) =1035a(25) =1135a(26) =1237a(27) =1343a(28) =1451a(29) =1563