#include <cstdio>

int main()
{
	int i=0;
	double sum=2.5;
		int fac=2;
	printf("n e\n");
	printf("- -----------\n");
	printf("0 1\n1 2\n2 2.5\n");
	for(i=3;i<=9;i++)
	{		fac*=i;
			sum+=(double)1/fac;
			printf("%d %.9f\n",i,sum);
			
	}

	return 0;
}