#include <iostream>
#include <fstream>

using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");

int n,i,j,contor,aux,d,a,b,sw;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            sw=0;
            if(i==1 || j==1) contor++;
            else
            {
                a=i;
                b=j;
                if(a<b) {aux=a;a=b;b=aux;}
                for(d=2;d<=a;d++)
                {
                    if(a%d==0 && b%d==0) sw=1;
                }
                if(sw==0) contor++;
            }
        }
    }
    g<<contor<<'\n';
    return 0;
    f.close();
    g.close();
}