First, please see the following remarkable patterns
Computing the repeating sequences of 1/p for 2 ≤ p < 100, prime except p=2, 5.
Explanation for the repeating sequences of 1/p and factors of repunit (10n|1)/9 : 11...11, repetition of "1").
In order to understand this problem, please try to solve the following questions.
Chapter 4 n=x3+y3+z3 |
"Mathematician's Secret Room" | Chapter 6 Additive Palindromicness of Natural Numbers |
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Chapter 4 (Japanese) | index (Japanese) | Chapter 6 (Japanese) |