a(1) = 10; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.

Terms

a(0) =10a(1) =13a(2) =23a(3) =49a(4) =111a(5) =113a(6) =171a(7) =211a(8) =293a(9) =309a(10) =333a(11) =387a(12) =463a(13) =479a(14) =513a(15) =687a(16) =933a(17) =973a(18) =993a(19) =1329a(20) =1433a(21) =1449a(22) =1551a(23) =2071a(24) =2271a(25) =2423a(26) =2587a(27) =2621a(28) =2659a(29) =2757