a(n) is equal to the number of positive integers m less than or equal to 10^n such that m is not divisible by the prime 3 and is not divisible by at least one of the primes 2, 5 and 7.
A128952
a(n) is equal to the number of positive integers m less than or equal to 10^n such that m is not divisible by the prime 3 and is not divisible by at least one of the primes 2, 5 and 7.
Terms
- a(0) =66a(1) =657a(2) =6572a(3) =65715a(4) =657143a(5) =6571429a(6) =65714286a(7) =657142857a(8) =6571428572a(9) =65714285715a(10) =657142857143
External references
- oeis: A128952