#include <stdio.h>

int main() {
   int n,i,j,k;
   FILE *f;
   f=fopen("fractii.in","r");
   fscanf(f,"%d",&n);
   fclose(f);
   k=n*n;
   for (i=1; i<=n; i++)
      for (j=1; j<=n; j++)
         if (((i % j==0) || (j % i==0)) && ((i!=1) && (j!=1)))
            k--;
   f=fopen("fractii.out","w");
   fprintf(f,"%d",k);
   fclose(f);
   return 0;
}