Compact formula | 184159800[144235918] - 20841768[322564791/2] + 105140284[201229582] + 216624176[299252491] + 188473236[468195145] + 100616384[851387893] + 202362220[1514342682] + 142143968[3472598789/2] - 30640352[4204410541/2] + 98912720[3866973557] + 178190700[7427844818] - 188151636[7959681215] + 42052804[75525552427/2] + 13376644[64506738863] - 158194364[118034929852] + 46132048[1087840667761/2] - 32188664[169838669284032] |
Lehmer's measure | 1.77401 |
References | Wetherfield, Michael Roby and Chien-Lih, Hwang. Computing pi: Lists of Machin-type (inverse cotangent) identities for pi/4, [Online; accessed 04-February-2024], 2013. [web.archive.org/web/20240204042153/http] [Found by Amrik Singh Nimbran on 13 January 2010.] |