#include <fstream.h>
#include <iostream.h>
int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    int i,j,n,ct=0,a,b;
    fin>>n;
    for (i=n;i>=1;i--)
    { j=1;
      for (j=1;j<=i;j++)
      {	if (i==1 || j==1) ct=ct+1;
	else
	{ a=i;b=j;
	  while (a!=b)
	  {
	    if (a>b) a=a-b;
	    else b=b-a;
	  }
	  if (a==1) ct=ct+1;
	}
      }
    }
    cout<<ct<<endl;
    ct=2*ct-1;
    fout<<ct;
    return 0;
}