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