58 lines
820 B
Markdown
58 lines
820 B
Markdown
---
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id: 5900f4181000cf542c50ff2b
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challengeType: 5
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title: 'Problem 172: Investigating numbers with few repeated digits'
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forumTopicId: 301807
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---
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## Description
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<section id='description'>
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How many 18-digit numbers n (without leading zeros) are there such that no digit occurs more than three times in n?
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler172()</code> should return 227485267000992000.
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testString: assert.strictEqual(euler172(), 227485267000992000);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler172() {
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// Good luck!
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return true;
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}
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euler172();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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