#include<fstream.h>
cmmdc(int x, int y)
{while(x!=y)
      if(x>y) x-=y;
      else y-=x;
return x;
}
void main()
{long int n,i,j,nr=0;
fstream f("fractii.in",ios::in);
fstream g("fractii.out",ios::out);
f>>n;
for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
	 if(cmmdc(i,j)==1) nr++;
g<<nr;}