Number of isolated primes < 10^n.

Terms

a(0) =1a(1) =10a(2) =99a(3) =820a(4) =7145a(5) =62161a(6) =546620a(7) =4880832a(8) =43998523a(9) =400227154a(10) =3669302718a(11) =33866741579a(12) =314396207096