Primes and squares of primes.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =9a(6) =11a(7) =13a(8) =17a(9) =19a(10) =23a(11) =25a(12) =29a(13) =31a(14) =37a(15) =41a(16) =43a(17) =47a(18) =49a(19) =53a(20) =59a(21) =61a(22) =67a(23) =71a(24) =73a(25) =79a(26) =83a(27) =89a(28) =97a(29) =101