a(1) = 2; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.

Terms

a(0) =2a(1) =3a(2) =9a(3) =11a(4) =13a(5) =63a(6) =71a(7) =93a(8) =187a(9) =189a(10) =201a(11) =207a(12) =243a(13) =347a(14) =369a(15) =439a(16) =473a(17) =529a(18) =611a(19) =847a(20) =1209a(21) =1331a(22) =1423a(23) =1581a(24) =1593a(25) =1617a(26) =1679a(27) =1791a(28) =2067a(29) =2529