#include <stdio.h>

using namespace std;
FILE*fin=fopen("fractii.in","r");
FILE*fout=fopen("fractii.out","w");
int main()
{
    int n,x,i,j,y,nr=0;
    fscanf(fin,"%d",&n);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
            {x=i;
            y=j;
            while(x!=y)
            {
                if(x>y)
                    x-=y;
                else
                    y-=x;
            }
            if(y==1)
                nr++;
            }
    }
    fprintf(fout,"%d\n",nr);
    return 0;
}