Smallest n-digit semiprime.

Terms

a(0) =4a(1) =10a(2) =106a(3) =1003a(4) =10001a(5) =100001a(6) =1000001a(7) =10000001a(8) =100000001a(9) =1000000006a(10) =10000000003a(11) =100000000007