#include <cstdio> //Ilie Dumitru

using namespace std;

int main()
{
    int n,i,j,a,b;
    long long int s;
    FILE *f,*g;
    f=fopen("fractii.in", "r");
    fscanf(f,"%i",&n);
    fclose(f);
    s=0;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            a=i;
            b=j;
            while(a&&b)
            {
                if(a>=b)
                    a%=b;
                else
                    b%=a;
            }
            if(a==1||b==1)
                s++;
        }
    g=fopen("fractii.out", "w");
    fprintf(g, "%lli", s);
    fclose(g);
    return 0;
}