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