freeCodeCamp/curriculum/challenges/spanish/08-coding-interview-prep/project-euler/problem-343-fractional-sequ...

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---
id: 5900f4c41000cf542c50ffd6
challengeType: 5
title: 'Problem 343: Fractional Sequences'
videoUrl: ''
localeTitle: 'Problema 343: Secuencias fraccionarias'
---
## Description
<section id="description"> Para cualquier entero k positivo, una secuencia finita ai de fracciones xi / yi se define por: a1 = 1 / k y ai = (xi-1 + 1) / (yi-1-1) reducido a los términos más bajos para i&gt; 1 . Cuando ai alcanza algún entero n, la secuencia se detiene. (Es decir, cuando yi = 1.) Defina f (k) = n. Por ejemplo, para k = 20: <p> 1/20 → 2/19 → 3/18 = 1/6 → 2/5 → 3/4 → 4/3 → 5/2 → 6/1 = 6 </p><p> Entonces f (20) = 6. </p><p> También f (1) = 1, f (2) = 2, f (3) = 1 y Σf (k3) = 118937 para 1 ≤ k ≤ 100. </p><p> Encuentre Σf (k3) para 1 ≤ k ≤ 2 × 106. </p></section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler343()</code> debe devolver 269533451410884200.
testString: 'assert.strictEqual(euler343(), 269533451410884200, "<code>euler343()</code> should return 269533451410884200.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler343() {
// Good luck!
return true;
}
euler343();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>