freeCodeCamp/curriculum/challenges/spanish/08-coding-interview-prep/project-euler/problem-258-a-lagged-fibonacci-sequence.spanish.md

---
id: 5900f46e1000cf542c50ff81
challengeType: 5
title: 'Problem 258: A lagged Fibonacci sequence'
videoUrl: ''
localeTitle: 'Problema 258: Una secuencia de Fibonacci retrasada'
---

## Description
<section id="description"> Una secuencia se define como: <p> gk = 1, para 0 ≤ k ≤ 1999 gk = gk-2000 + gk-1999, para k ≥ 2000. Encuentre gk mod 20092010 para k = 1018. </p></section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler258()</code> debe devolver 12747994.
    testString: 'assert.strictEqual(euler258(), 12747994, "<code>euler258()</code> should return 12747994.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler258() {
  // Good luck!
  return true;
}

euler258();

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>