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Search: id:A015884
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| A015884 |
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A modified Pierce-type expansion for Pi: Pi = a(0)+Sum[ (-1)^Floor(n/2)/Product[a(i),{i,1,n}],{n,1,Infinity} ] = 3 + 1/7 - 1/7*113 - 1/7*113*4739 + 1/7*113*4739*46804 + 1/7*113*4739*46804*134370 - 1/7*113*4739*46804*134370*614063 - 1/7*113*4739*46804*134370*614063*1669512 + ... |
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| 3, 7, 113, 4739, 46804, 134370, 614063, 1669512, 15474115, 18858140, 19180902, 41486462, 492988666, 1794101482, 34644610027, 48670872793, 97414216753, 138669015304, 195575194804, 543142431219, 3173502039447, 4968328076747
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