M000116

$$\pi=76648\arctan\left(\frac{1}{39356}\right)+48000\arctan\left(\frac{1}{51412}\right)+36000\arctan\left(\frac{2}{362619}\right)-6796\arctan\left(\frac{1}{623098}\right)+52424\arctan\left(\frac{1}{734557}\right)-6796\arctan\left(\frac{1}{2634273}\right)-25084\arctan\left(\frac{1}{6826318}\right)+57900\arctan\left(\frac{1}{7626068}\right)+732\arctan\left(\frac{1}{21072618}\right)+33676\arctan\left(\frac{1}{2539791558}\right)$$
Compact formula76648[39356] + 48000[51412] + 36000[362619/2] - 6796[623098] + 52424[734557] - 6796[2634273] - 25084[6826318] + 57900[7626068] + 732[21072618] + 33676[2539791558]
Lehmer's measure1.65335
References
MRW (08Nov03) (full reference coming soon)