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