This really belongs in the fun space. Why was this moved without any discussion? - User 4 ∑ n = 0 ∞ ( − 1 ) n ( 2 n + 1 ) − 1 {\displaystyle \scriptstyle 4\sum _{n=0}^{\infty }(-1)^{n}(2n+1)^{-1}} 22:34, 12 January 2009 (EST)
