Mean (rounded) of primes below 10^n.

Terms

a(0) =4a(1) =42a(2) =453a(3) =4668a(4) =47372a(5) =478361a(6) =4820082a(7) =48461680a(8) =486543007a(9) =4880365186a(10) =48922874243a(11) =490205054291