# include <stdio.h>
/** ypologismos anadromikis sxesis **/

double alphan(int n)
{
	if(n==0) return 1.0;
	else
	{
		/** Gia logous taxititas mpike se 
		 * prosorini metabliti to alphan(n-1)**/
		int t=alphan(n-1);
		return (3*t*t-1.0)/t;
	}
}

int main()
{
	int i;
	for(i=0;i<10;i++)
	{
		printf("%4d%12.2lf\n",i,alphan(i));
	}
 return 0;
}