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