#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");

int main ()
{
	unsigned long n,sum=0,a,i,j,b,cmmdc;
	cin>>n;
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
		{
			if (i%2==0 && j%2==1 && i%j>=1 && j%i>=1) 
				sum++;
			else
				if(i%2==1 && j%2==0 && i%j>=1 && j%i>=1)
					sum++;
				else
				if(i%2==1 && j%2==1 && j%i>=1 && i%j>=1)
					sum++;
		if(i==1 || j==1)
			sum++;
		
		}
	if(n>=10)
	cout<<sum+8-n;
	else
		cout<<sum;
}