#include<iostream.h>
#include<fstream.h>
unsigned int n,i,j,a,b,s,r;
fstream f("fractii.in",ios::in);
fstream g("fractii.out",ios::out);
void main()
{
f>>n;
for(i=1;i<=n;i++)
	for(j=1;j<=n;j++)
		if(i%j!=0||j%i!=0)
		{
			a=i;
			b=j;
			while(a!=b)
			{
				if(a>b)
					a=a-b;
				else
					b=b-a;
			}
			if(b==1)
				s++;
		}
		else
			if(i==1||j==1)
				s++;
g<<s;
f.close();
g.close();
}