#include<bits/stdc++.h>
using namespace std;
//bool prii;
long long n,k;
int primm(long long x,long long y){
	long long mn; 
	mn=min(x,y);
	if((x==1)||(y==1))return 1;else{
		if(x==y)return 0;else{
			
	
	for(int i=2;i<=mn;i++){
		if((x % i == 0)&&(y % i == 0))return 0;else return 1;
	}	
	}
	}
}
int main(){
ifstream cin("fractii.in");
ofstream cout("fractii.out");
	cin>>n;
	for(long long i=1;i<=n;i++)
		for(long long j=1;j<=n;j++){
			if(primm(i,j))k++;
		}
	cout<<k;
return 0;
}