#include<fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int v[100],n,i,j,f;
void citire()
	{ int c=1;
	  fin>>n;
		for(i=0;i<n;i++)
		{
		 v[i]=c;
		 c++;
		}
	}
void ir_()
	{ for(i=0;i<n;i++)
		{ for(j=0;j<n;j++)
			{ if(v[i]%v[j]!=0||v[j]%v[i]!=0)
				{
				 f++;
				}
			}
		}
	 
	}
	

int main()
	{ citire();
	 ir_();
	 fout<<f;
	 return 0;
	 
	}