M000000532

$$\pi=16\arctan\left(\frac{1}{3}\right)-4\arctan\left(\frac{1}{7}\right)-16\arctan\left(\frac{1}{23}\right)-16\arctan\left(\frac{1}{30}\right)-8\arctan\left(\frac{1}{38}\right)$$

Compact formula	`16[3] - 4[7] - 16[23] - 16[30] - 8[38]`
Lehmer's measure	5.32354