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Here's something my fellow mathnerds may find interesting. This works rather well and fast. At n=3 you get 3.14159245757. \pi=\sum_{n=0}^{\infty}\left(\frac{4}{8n+1}-\frac{2}{8n+4}-\frac{1}{8n+5}-\frac{1}{8n+6}\right)\cdot\left(\frac{1}{16}\right)^{n} View more questions Search
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