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