Problem Statement
A positive integer $n$ is called squarefree, if no square of a prime divides $n$, thus $1, 2, 3, 5, 6, 7, 10, 11$ are squarefree, but not $4, 8, 9, 12$.
How many squarefree numbers are there below $N$?
Submit Answers
If $f(N)$ is the problem asked for above, then you need to submit values of $g(N) = f(1 \times 8^N)$
You need to submit in the format: "N:g(N)", possibly with multiple values at once, separated by commas.