M000000161

$$\pi=3232\arctan\left(\frac{1}{1118}\right)+1396\arctan\left(\frac{1}{5283}\right)-372\arctan\left(\frac{2}{47761}\right)-332\arctan\left(\frac{1}{63757}\right)+860\arctan\left(\frac{2}{313489}\right)+332\arctan\left(\frac{1}{185882}\right)-244\arctan\left(\frac{1}{2733307}\right)+1768\arctan\left(\frac{1}{23747457}\right)$$