#include <fstream>

using namespace std;

int main()
{
    int n,i,j,p=0,a,b,c;
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    fin>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            if(i==1||j==1) p++;
            else
            {
                if(i>j)
                {
                    a=i;
                    b=j;
                }
                else
                {
                    a=j;
                    b=i;
                }
                while(b)
                {
                    c=a%b;
                    a=b;
                    b=c;
                }
                if(a==1) p++;
            }
        }
    }
    fout<<p;
    fin.close();
    fout.close();
    return 0;
}