#include<iostream>
using namespace std;
int main()
{
	int i;
	double s=2.5,t,m;
	cout<<"n e"<<endl;
	cout<<"- -----------"<<endl;
	cout<<"0 1"<<endl<<"1 2"<<endl<<"2 2.5"<<endl;
	for(i=3;i<10;i++)
	{
		m=1;
		for(t=i;t>0;t--)
			m/=t;
		s+=m;
		printf("%d %.9f\n",i,s);
	}
	return 0;
}