#include <iostream>
#include <fstream>
using namespace std;
int main()
{   ifstream f("fractii.in");
    ofstream g("fractii.out");
    unsigned n,i,j,k=0,ok,d;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            if(i==1) k++;
                else {  ok=1;
                        for(d=2;d<=n;d++)
                        if(i%d==0&&j%d==0) ok=0;
                        if(ok==1) k++;}
    g<<k;
    f.close();
    g.close();
    return 0;
}