> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/f/frobenius_numbers.md).

# Frobenius numbers

```ruby
func frobenius_number(n) {
    prime(n) * prime(n+1) - prime(n) - prime(n+1)
}

say gather {
    1..Inf -> each {|k|
        var n = frobenius_number(k)
        break if (n >= 10_000)
        take(n)
    }
}
```

## Output:

```
[1, 7, 23, 59, 119, 191, 287, 395, 615, 839, 1079, 1439, 1679, 1931, 2391, 3015, 3479, 3959, 4619, 5039, 5615, 6395, 7215, 8447, 9599]
```