#include <fstream>
#include <iostream>

using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
long long unsigned i,j,k,a,b,r,n,v;
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            a=i;b=j;
        while(b)
    {
        r=a%b;
        a=b; b=r;
    }
        if(a==1)
        k++;
        }
        fout<<k;



    return 0;
}