---
id: 5900f3901000cf542c50fea3
challengeType: 5
title: 'Problem 36: Double-base palindromes'
videoUrl: ''
localeTitle: 'Задача 36: Палиндромы с двойной базой'
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert(doubleBasePalindromes(1000) == 1772, "<code>doubleBasePalindromes(1000)</code> should return 1772.");'
  - text: ''
    testString: 'assert(doubleBasePalindromes(50000) == 105795, "<code>doubleBasePalindromes(50000)</code> should return 105795.");'
  - text: ''
    testString: 'assert(doubleBasePalindromes(500000) == 286602, "<code>doubleBasePalindromes(500000)</code> should return 286602.");'
  - text: ''
    testString: 'assert(doubleBasePalindromes(1000000) == 872187, "<code>doubleBasePalindromes(1000000)</code> should return 872187.");'

```

</section>

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

<div id='js-seed'>

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

doubleBasePalindromes(1000000);

```

</div>



</section>

## Solution
<section id='solution'>

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