M000306

$$\pi=11220\arctan\left(\frac{1}{5257}\right)-1592\arctan\left(\frac{1}{9466}\right)+7800\arctan\left(\frac{1}{12943}\right)+7400\arctan\left(\frac{1}{34208}\right)+8084\arctan\left(\frac{1}{44179}\right)+8388\arctan\left(\frac{1}{85353}\right)+5936\arctan\left(\frac{1}{114669}\right)+5556\arctan\left(\frac{1}{330182}\right)+3232\arctan\left(\frac{1}{485298}\right)$$