#include<stdio.h>
FILE *in=fopen("fractii.in","r");
FILE *out=fopen("fractii.out","w");
long int n,i,j,nr,ok,k,a,b;
int main()
{
fscanf(in,"%ld",&n);
for(i=1;i<=n;i++)
	{
	for(j=1;j<=n;j++)
		{
		a=i;b=j;
		while(a!=b)
			{
			if(a>b) a-=b;
			else b-=a;
			}
		if(a==1) nr++;
		}
	}
fprintf(out,"%ld",nr);
return 0;
}