int main()
{
	int n,i,sum;
	sum=0;
	scanf("%d",&n);
	for (i=1;i<=n;i++)
	{
        int r,shiwei;
		r=i%10;
		shiwei=(i-r)/10;
		if(i%7==0)
		  sum=sum+0;
		else if((i-7)%10==0)
			   sum=sum+0;
		     else if (shiwei==7)
					 sum=sum+0;
			      else sum=sum+i*i;
	}
	printf("%d\n",sum);
	return 0;
}