a(n) is the largest n-digit number with exactly 4 divisors.
A182648
a(n) is the largest n-digit number with exactly 4 divisors.
Terms
- a(0) =8a(1) =95a(2) =998a(3) =9998a(4) =99998a(5) =999997a(6) =9999998a(7) =99999997a(8) =999999991a(9) =9999999997a(10) =99999999997a(11) =999999999997
External references
- oeis: A182648