#include <stdio.h>
int n,p,q,aux,i,j,k;
int main()
{
    freopen("fractii.in","r",stdin);
    freopen("fractii.out","w",stdout);
    scanf("%d",&n);
    k=0;
    for (i=1;i<=n;i++)
     for(j=1;j<=n;j++)
      {
         p=i;
         q=j;
         if (p<q)
         {
                 aux=p;
                 p=q;
                 q=aux;
         }                                  
      if (p%q!=0 || (p/q==p))
       k=k+1;
       }
      printf("%d",k);
    return 0;
}