#include<stdio.h>
int cmmdc(int a, int b)
{
    if((!a) || (!b)) return a+b;
    if(a>b) return cmmdc(a%b,b);
    return cmmdc(a,b%a);
}
int main()
{
    FILE *f;
    int m=0;
    FILE *g;
    f=fopen("fractiin.txt","r");
    g=fopen("fractiiout.txt","w");
    int n;
    fscanf(f,"%d",&n);
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            m++;
            if(cmmdc(i,j)!=1)
            {
                m--;
            }
        }
    }
    fprintf(g,"%d",m);
}