a(n) = (10^n)-th prime.

Terms

a(0) =2a(1) =29a(2) =541a(3) =7919a(4) =104729a(5) =1299709a(6) =15485863a(7) =179424673a(8) =2038074743a(9) =22801763489a(10) =252097800623