#include<iostream>
#include<fstream>
using namespace std;
int n,F,i,j,a,b;
int main()
{
	fstream f("fractii.in",ios::in),
	        g("fractii.out",ios::out);
	
	f>>n;
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n;j++)
		{
			a=i;
			b=j;
			while (a!=b)
				if(a>b) 
					a=a-b;
	            else 
		        	b=b-a;
			if(a==1)
				F++;
		}	
	}
	g<<F;
	
	return 0;
}