#include<stdio.h>
int main()
{int i,j,s,n,a,b;
FILE *f,*g;
f=fopen("fractii.in","r");
g=fopen("fractii.out","w");
fscanf(f,"%d",&n);
s=0;
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) s++;
}

}

fprintf(g,"%d",s);
fclose(g);
return 0;
}