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 5 and is not divisible by at least one of the primes 2, 3 and 7.
A128951
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 5 and is not divisible by at least one of the primes 2, 3 and 7.
Terms
- a(0) =78a(1) =781a(2) =7809a(3) =78096a(4) =780952a(5) =7809524a(6) =78095238a(7) =780952381a(8) =7809523809a(9) =78095238096a(10) =780952380952
External references
- oeis: A128951