#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    int n,i,j,k,o;
    fin>>n;
    int s=0;
    for(i=2;i<=n;i++)
        for(j=2;j<=n;j++)
            for(k=2;(k<=i)&&(k<=j);k++)
                if((i%k==0)&&(j%k==0)) {s=s+1;break;}
    s=n*n-s;
    fout<<s<<"\n";
    fin.close();
    fout.close();
    return 0;
}