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