"""
Aufgabe 38
(c) Jürgen Meier
www.3d-meier.de
16.12.2025
"""

import math



k = 50   # Endwert Laufvariable
s = 0    # Summe



for k in range(2, k+1):
    s = s + 1.0/(k*k-1)    
    print(s)


print("--------------------------")
print(931.0/1275)