#include<iostream>
#include<fstream>
using namespace std;

ifstream ifile;
ofstream ofile;
int i,j,k,n,u,v,cont=0;

struct Nod{
       Nod *next;
       double val;     
};

bool notIn(Nod *&u, double x){
     
     int ok;
   	 Nod *r;
	 r=u;
	 ok=1;
	 while(r!=NULL && ok)
	 {
                   if(x==r->val) ok=0;
		           else r=r->next;
	 }
	 if(ok) return true;
	 return false;
}

void add(Nod *&u, double x){
     Nod *a;
	 a=new Nod;
	 a->val=x;
	 a->next=u;
	 u=a;
}

int main(){
    ifile.open("fractii.in");
    ofile.open("fractii.out");
    
    Nod *a = NULL;
    ifile>>n;
    

    for(i=1;i<=n;i++){
         for(j=1;j<=n;j++){
               if((i/j==i || i%j!=0) && notIn(a,(double)i/j)){
                         add(a,(double)i/j);
                         k=2;
                         while(k*i<=n && k*j<=n){
                              cont++;
                              k++;
                         }
               }
               
         }
    }
    
    ofile<<n*n-cont;
    
    ifile.close();
    ofile.close();
    return 0;
}