a(1) = 2; a(n+1) is the smallest prime > a(n) which differs from it in every digit.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =23a(6) =31a(7) =43a(8) =59a(9) =61a(10) =73a(11) =89a(12) =97a(13) =101a(14) =223a(15) =307a(16) =419a(17) =503a(18) =617a(19) =701a(20) =823a(21) =907a(22) =1013a(23) =2129a(24) =3001a(25) =4127a(26) =5003a(27) =6121a(28) =7013a(29) =8101