#include <iostream>
#include <stdio.h>

using namespace std;
bool prime(int a,int b)
{
    while(b!=0)
    {
        int r=a%b;
        a=b;
        b=r;
    }
    return a==1;
}

int main()
{
    freopen("fractii.in","r",stdin);
    freopen("fractii.out","w",stdout);

    int n,c=0;
    scanf("%d",&n);

    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++)
        if(prime(i,j))
        c++;

    printf("%d",c);
    return 0;
}