#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
long prim(long x,long y)
{
	int z;
	while(y)
	{
		z=x%y;
		x=y;
		y=z;
	}
	if(x==1)
		return 1;
	else
		return 0;
}
int main()
{
	long n,i,j,nr=0;
	f>>n;
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
		{
			if(j==1||i==1)
				nr++;
			else
				if(i%j!=0&&j%i!=0)
					if((i%2==0&&j%2==1)||(i%2==1&&j%2==0)||(i%2==1)&&(j%2==1))
						if(prim(i,j)==1)
						    nr++;
		}
	g<<nr;
	return 0;
}