#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int N,nr,i,j;
int prim(int a,int b)
{
    int x,y;
    x=a; y=b;
    while(x!=y)
        if(x>y)
        x=x-y;
    else
        y=y-x;
    if(x==1)
        return 1;
    else
        return 0;
}
int main()
{
    f>>N;
    nr=0;
    for(i=1;i<=N;i++)
        for(j=1;j<=N;j++)
        if(prim(i,j)==1)
            nr++;
        g<<nr;
        f.close();
        g.close();
        return 0;
}