a(1)=2, a(n+1) is the largest prime < 2+n^smallest digit of a(n).

Terms

a(0) =2a(1) =2a(2) =5a(3) =241a(4) =5a(5) =3121a(6) =7a(7) =823541a(8) =7a(9) =4782961a(10) =11a(11) =11a(12) =13a(13) =13a(14) =13a(15) =13a(16) =17a(17) =17a(18) =19a(19) =19a(20) =19a(21) =19a(22) =23a(23) =523a(24) =577a(25) =9765619a(26) =23a(27) =727a(28) =773a(29) =24379