Smallest safe prime ((p-1)/2 is also prime) > n-th prime.

Terms

a(0) =5a(1) =5a(2) =7a(3) =11a(4) =23a(5) =23a(6) =23a(7) =23a(8) =47a(9) =47a(10) =47a(11) =47a(12) =47a(13) =47a(14) =59a(15) =59a(16) =83a(17) =83a(18) =83a(19) =83a(20) =83a(21) =83a(22) =107a(23) =107a(24) =107a(25) =107a(26) =107a(27) =167a(28) =167a(29) =167