# Function bellNumbers

Calculate the Bell Number for an `n` element set.

## Syntax

```js
math.bellNumbers(n)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`n` | Number | BigNumber | Function input

### Returns

Type | Description
---- | -----------
Number | BigNumber | The number of ways to partition a set of n elements.


## Examples

```js
math.bellNumbers(5);           // returns Number 52
math.bellNumbers(math.bignumber(10)); // returns Number 115975
```


## See also

[combinations](combinations.md),
[stirlingS2](stirlingS2.md)


<!-- Note: This file is automatically generated from source code comments. Changes made in this file will be overridden. -->