#include<iostream> #include <iomanip> using namespace std; int main() { int i,n; double s,t; cout<<"n e"<<endl; cout<<"- -----------"<<endl; cout<<"0 1"<<endl; cout<<"1 2"<<endl; cout<<"2 2.5"<<endl; s=2.5; n=2; for(i=3; i<=9; i++) { n=i*n; s+=1.0/n; cout<<i<<" "<<fixed<<setprecision(9)<<s<<endl; } return 0; }