Primes written backwards.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =31a(6) =71a(7) =91a(8) =32a(9) =92a(10) =13a(11) =73a(12) =14a(13) =34a(14) =74a(15) =35a(16) =95a(17) =16a(18) =76a(19) =17a(20) =37a(21) =97a(22) =38a(23) =98a(24) =79a(25) =101a(26) =301a(27) =701a(28) =901a(29) =311