#include <iostream>
#include <fstream>

using namespace std;

int P, N, Q, Pc, Qc, nr=0;

int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f >> N;

    for(P=1; P<=N; P++)
    {
        for(Q=1; Q<=N; Q++)
        {
            Pc = P;
            Qc = Q;
            //verificam daca sunt prime intre ele
            while(Pc!=Qc)
            {
                if(Pc>Qc) Pc-=Qc;
                else Qc-=Pc;
            }
            if(Qc==1) nr++;
        }

    }
    g << nr;
    return 0;
}