#include <fstream>

using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
    long n,i,j,nr=0,a,b;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            a=i;
            b=j;
            while(a!=b)
                if(a>b)a-=b;
                else b-=a;
            if(a==1)nr++;
        }
    }
    fout<<nr;
    return 0;
}