#include <iostream>
#include <iomanip>

using namespace std;

int main() {
  double first;
  cout << "Entrez le premier element de la suite : ";
  cin >> first;
  cout << endl << setw(25) << setprecision(20) << first << endl;

  int steps = 100;
  double next = first;      
  for (int i=0; i<steps; i++) {
    cout << i << " : " << setw(25) << setprecision(20) << next << endl;
    next = -3.*next*next/8. + 9.*next/4. - 3./8.;
    //next = -4.*next*next/9. + 26.*next/9. - 4./9.;
  }

  return 0;
}