This really belongs in the fun space. Why was this moved without any discussion? - User ( 6 ∑ n = 1 ∞ n − 2 ) 1 / 2 {\displaystyle \scriptstyle (6\sum _{n=1}^{\infty }n^{-2})^{1/2}} 22:34, 12 January 2009 (EST)