#include <iostream>
#include <fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int main()
{
    int N,nr=1,i,j,k;
    in>>N;
    for (i=2; i<=N; i++)
        for (j=2; j<=N; j++)
            if(i%j!=0)
                for (k=1; k<=N; k++)
                    if((i/j)%k!=0)
                        nr++;
    out<<nr;
}