https://github.com/semibran/catalan

Calculate Catalan numbers
https://github.com/semibran/catalan

Last synced: 8 months ago
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Calculate Catalan numbers

• Host: GitHub
• URL: https://github.com/semibran/catalan
• Owner: semibran
• License: mit
• Created: 2017-06-27T19:46:01.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2017-06-27T19:49:06.000Z (almost 9 years ago)
• Last Synced: 2025-03-16T11:45:54.961Z (over 1 year ago)
• Language: JavaScript
• Size: 1000 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: license

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README

          
# catalan

![C(5) = 42 noncrossing partitions of a 5-element set](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Noncrossing_partitions_5.svg/220px-Noncrossing_partitions_5.svg.png)

A small function for calculating [Catalan numbers](https://en.wikipedia.org/wiki/Catalan_number).

## usage

[![NPM](https://nodei.co/npm/catalan.png?mini)](https://www.npmjs.com/package/catalan)

```js

> const catalan = require('catalan')

> catalan(5)

42

> catalan(-1)

NaN

```

## see also

- [`semibran/narayana`](https://github.com/semibran/narayana) - calculate Narayana numbers

## license

[MIT](https://opensource.org/licenses/MIT) © [Brandon Semilla](https://git.io/semibran)