#include<fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int cmmdc(int a,int b);
int main()
{
    int n,total=0,i,j,p,q;
    in>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            if(cmmdc(i,j) == 1) total++;
        }
    }
    out<<total;
    in.close();
    out.close();
    return 0;
}
int cmmdc(int a,int b)
{
    int nrdiv=0,i;
    for(i=1;i<=a;i++)
        if(a%i==0&&b%i==0) nrdiv++;
    return nrdiv;
}