---
title: Hofstadter Q sequence
id: 59637c4d89f6786115efd814
challengeType: 5
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert(typeof hofstadterQ === "function", "<code>hofstadterQ</code> is a function.");'
  - text: ''
    testString: 'assert(Number.isInteger(hofstadterQ(1000)), "<code>hofstadterQ()</code> should return <code>integer</code>");'
  - text: ''
    testString: 'assert.equal(hofstadterQ(testCase[0]), res[0], "<code>hofstadterQ(1000)</code> should return <code>502</code>");'
  - text: ''
    testString: 'assert.equal(hofstadterQ(testCase[1]), res[1], "<code>hofstadterQ(1500)</code> should return <code>755</code>");'
  - text: ''
    testString: 'assert.equal(hofstadterQ(testCase[2]), res[2], "<code>hofstadterQ(2000)</code> should return <code>1005</code>");'
  - text: ''
    testString: 'assert.equal(hofstadterQ(testCase[3]), res[3], "<code>hofstadterQ(2500)</code> should return <code>1261</code>");'

```

</section>

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

<div id='js-seed'>

```js
function hofstadterQ (n) {
  // Good luck!
  return n;
}

```

</div>


### After Test
<div id='js-teardown'>

```js
console.info('after the test');
```

</div>

</section>

## Solution
<section id='solution'>

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