#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int nr,Q,P,N,a,b;
int main()
{f>>N;
for(P=1;P<=N;P++)
	for(Q=1;Q<=N;Q++)
		if(P==1||Q==1)
			nr++;
		else
			{a=P;b=Q;
		    while(a!=b)
				if(a>b)
					a=a-b;
				else
					b=b-a;
			if(a==0||a==1)
				nr++;}
g<<nr<<'\n';
g.close();
f.close();}