#include <fstream>

using namespace std;

int cmmdc(int a,int b);

int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int n,j,i;
    f>>n;
    int s=0;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        if(cmmdc(i,j)==1) s++;
g<<s;
    f.close();
    g.close();
    return 0;
}
int cmmdc(int a,int b)
{
    int r=a%b;
    while(r!=0)
    {
        a=b;
        b=r;
        r=a%b;}
        return b;
}