#include <cstdio>
int fractii(int a, int b)
{
    while(a!=b)
        if(a>b) a-=b;
            else b-=a;
        return a;
}
int main()
{

int n,ct=0;
    freopen("fractii.in", "r", stdin);   
    freopen("fractii.out", "w", stdout);
    scanf("%d\n",&n);   
    for(int i=1;i<=n;i++)
    	for(int j=1;j<=n;j++)
      	{if(fractii(i,j)==1)ct++;}
    printf("%d\n", ct);
return 0;
}