M000066

$$\pi=69852\arctan\left(\frac{1}{39356}\right)+54796\arctan\left(\frac{1}{51412}\right)+42796\arctan\left(\frac{2}{362619}\right)-6796\arctan\left(\frac{1}{346219}\right)+59220\arctan\left(\frac{1}{734557}\right)-31880\arctan\left(\frac{1}{6826318}\right)+64696\arctan\left(\frac{1}{7626068}\right)+732\arctan\left(\frac{1}{21072618}\right)+47268\arctan\left(\frac{1}{2539791558}\right)+6796\arctan\left(\frac{1}{253305454667}\right)$$