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REFERENCES
| C. Pickover, Mazes for the Mind, St. Martin's Press, NY, 1992, p. 350-351.
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MATHEMATICA
| Clear[a, n];
a = {2, 71, 828, 1828, 45904, 5235360, 2874713, 52662497, 757247093, 6999595749, 66967627724, 76630353547,
5945713821785, 25166427427466, 391932003059921, 8174135966290435, 72900334295260595, 630738132328627943};
b = Table[Length[IntegerDigits[a[[n]]]], {n, 1, Length[a]}];
c = Table[Sum[b[[m]], {m, 1, n}] - 1, {n, 1, Length[b]}] Sum[a[[n]]/10^(c[[n]]), {n, 1, Length[a]}];
N[% - E, 100]
|
