M000000084

$$\pi=14324\arctan\left(\frac{2}{10039}\right)+1464\arctan\left(\frac{1}{18543}\right)+7860\arctan\left(\frac{2}{86161}\right)+3692\arctan\left(\frac{1}{86432}\right)-6796\arctan\left(\frac{1}{156183}\right)+10808\arctan\left(\frac{2}{914761}\right)+2832\arctan\left(\frac{1}{1901658}\right)+4872\arctan\left(\frac{1}{2215351}\right)$$