---
id: 5900f4181000cf542c50ff2b
title: 'Problem 172: Investigating numbers with few repeated digits'
challengeType: 5
forumTopicId: 301807
dashedName: problem-172-investigating-numbers-with-few-repeated-digits
---

# --description--

How many 18-digit numbers n (without leading zeros) are there such that no digit occurs more than three times in n?

# --hints--

`euler172()` should return 227485267000992000.

```js
assert.strictEqual(euler172(), 227485267000992000);
```

# --seed--

## --seed-contents--

```js
function euler172() {

  return true;
}

euler172();
```

# --solutions--

```js
// solution required
```