Distinct-digit prime powers of prime numbers.

Terms

a(0) =4a(1) =8a(2) =9a(3) =25a(4) =27a(5) =32a(6) =49a(7) =125a(8) =128a(9) =169a(10) =243a(11) =289a(12) =361a(13) =529a(14) =841a(15) =961a(16) =1369a(17) =1849a(18) =2048a(19) =2187a(20) =2197a(21) =2809a(22) =3125a(23) =3481a(24) =3721a(25) =4913a(26) =5041a(27) =5329a(28) =6241a(29) =6859