Compact formula | - 30208800199660[11244667034168] + 21133772784376[13471100859672] + 15866977433312[13502703082318] - 6867127609184[14483848717682] + 51116123176[15962244871097] + 65284249734904[20293776947868] - 86006722088[33308851938318] + 26749750655376[41887379804066] - 27974813992248[56217817479361] - 12225831436032[120734320006489/2] - 22378239657512[69971515635443] + 31509121598164[83979525486773] + 16332525217564[127528611030443] + 14729878256464[158682175700807] + 18009298963588[187458398552950] + 21582584232876[211773236092865] - 48183299697584[240926005152903] + 13760410266444[258213230677943] - 1236389766344[317335434728073] + 15765893830420[370392816588001] + 29063541999032[758341235653128] - 7757451071776[830202489183166] + 42184643415252[1143900177872158] - 13689797167972[1427056404016693] - 59236247944968[2270451385422943] + 15385583191708[4204987898062723] + 36190509636232[6583404855656943] - 4065820298292[6805164953551432] - 22494404572056[7672113772158307] + 15653363364184[73243144300402318] |
Lehmer's measure | 2.09459 |
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 MRW on 28 February 2008.] |