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

int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int N, x, y;
    long k=0;
    f>>N;
    for(int i=1; i<=N;i++)
    {
        for(int j=1; j<=N; j++)
        {
            x=i; y=j;
            while(x!=y){if(x>y)x=x-y; else y=y-x;}
            if(x==1)k++;
        }
    }
    g<<k;
    f.close();
    g.close();
    return 0;
}