Machin-like formulae
M000474: Euler's Machin-like formula
$$\pi=4\arctan\left(\frac{1}{2}\right)+4\arctan\left(\frac{1}{3}\right)$$
Name
Euler's Machin-like formula
Compact formula
4[2] + 4[3]
Lehmer's measure
5.41783
References
*MACHIN (1706)
(full reference coming soon)