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