#include<stdio.h>   
  
int valid(int a,int b)   
{   
while(a!=b)   
    {   
    if(a>b)a-=b;   
    else b-=a;   
    }   
if(a==1)return 1;   
return 0;   
}   
  
int main()   
{   
freopen("fractii.in","r",stdin);   
freopen("fractii.out","w",stdout);   
int n,sol=0,i,j;   
scanf("%d",&n);   
for(i=1;i<=n;i++)   
    for(j=1;j<=n;j++)   
        if(valid(i,j))sol++;   
printf("%d",sol);   
return 0;   
}