#include <fstream>

using namespace std;

ifstream in("fractii.in");
ofstream out("fractii.out");

int main()
{
    int n,cnt=0;
    in>>n;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++)
        {
            int r,ii=i,jj=j;
            while(jj)
            {
                r=ii%jj;
                ii=jj;
                jj=r;
            }
            if(ii==1) cnt++;
        }
    out<<cnt;
    return 0;
}