Machin-like formulae

M000170

$$\pi=62324\arctan\left(\frac{2}{47239}\right)+38690\arctan\left(\frac{1}{96348}\right)+11634\arctan\left(\frac{2}{362619}\right)+9310\arctan\left(\frac{1}{187718}\right)-9310\arctan\left(\frac{1}{410038}\right)+4424\arctan\left(\frac{1}{734557}\right)-8246\arctan\left(\frac{1}{6826318}\right)+41062\arctan\left(\frac{1}{7626068}\right)+8260\arctan\left(\frac{1}{21072618}\right)-7528\arctan\left(\frac{1}{26157373}\right)$$
Compact formula62324[47239/2] + 38690[96348] + 11634[362619/2] + 9310[187718] - 9310[410038] + 4424[734557] - 8246[6826318] + 41062[7626068] + 8260[21072618] - 7528[26157373]
Lehmer's measure1.72072
References
ASN (25Jun11) (full reference coming soon)
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