//?7???????


int main()
{
	int n,i,sum=0;
	int a[100];                          //???????7???
	cin>>n;
	for (i=1;i<=n;i++)                   //?????????????????
	{
		a[i]=i;                          //??i??????i??
		if (i%7==0||i%10==7||i/10==7)    //?i??7??????7????7???7??
			a[i]=0;                      //??a[i]?0
		sum=sum+a[i]*a[i];               //?????
	}
	cout<<sum;
	return 0;
}
