from math import *

def integral(N_pieces,dx):
    E=0.0
    x=-dx/2.0
    for i in range(N_pieces):
        x=x+dx
 #       print x  # test line
        r=2.2-x
        dE=8.99e9*10*dx/pow(r,2.0)
        E=E+dE
 #       print E   # test line
    return E
    
################################# 
# what follows is the main routine
##################################
print 'N\t\t\tE(N)'
#for j in range(1):      # test line
for j in range(9):
    N=pow(2.0,j+2)
    N=int(N)
    h=2.0/N
    I=integral(N,h)
    print N,'\t\t\t',I