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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A307388 Length of the period of decimal representation of Product_{k=1..n} A038111(k)/A038110(k).

Table of values

n a(n)
9 1
10 27
11 729
12 59049
13 43046721
14 31381059609
15 68630377364883
16 150094635296999121
17 328256967394537077627
18 717897987691852588770249
19 4710128697246244834921603689
20 92709463147897837085761925410587
21 3649600726280146254718103955713167842

List of values

[1, 27, 729, 59049, 43046721, 31381059609, 68630377364883, 150094635296999121, 328256967394537077627, 717897987691852588770249, 4710128697246244834921603689, 92709463147897837085761925410587, 3649600726280146254718103955713167842]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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