#include        <stdio.h>
#include        <math.h>

int main(int argc, char *argv[])
{
#define  N   21
  int  k;

  double  I[N];
  I[0] = 1.0 - exp(-1.0);
  for ( k = 1; k < N; k++ )
    I[k] = k*I[k-1] - exp(-1.0);
  

  for ( k = 0; k < N; k++ )
    printf("I[%d] = %20.14g\n", k, I[k]);
}