a(n) = prime(prime(n^2)).

Terms

a(0) =3a(1) =17a(2) =83a(3) =241a(4) =509a(5) =877a(6) =1433a(7) =2063a(8) =2897a(9) =3911a(10) =4943a(11) =6353a(12) =8011a(13) =9661a(14) =11909a(15) =13693a(16) =16141a(17) =18787a(18) =21727a(19) =24781a(20) =28307a(21) =32261a(22) =35801a(23) =40093a(24) =44621a(25) =49139a(26) =54251a(27) =59417a(28) =64853a(29) =70621