#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int cmmdc(int a,int b)
{   int i;
    if(a==1 || b==1)return 1;
    if(a>b)swap(a,b);
    if(b%a==0)return a;
    if(b%2==0&&a%2==0)return 2;
    for(i=3;i*i<=a;i=i+2)
        if(a%i==0&&b%i==0)return i;
    return 1;

}
int main()
{
    int n,i,j,cnt=0;
    fin>>n;
    for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
    if(cmmdc(i,j)==1) cnt++;

    fout<<cnt;

    return 0;
}