> 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/s/sequence_of_non-squares.md).

# Sequence of non-squares

```ruby
func nonsqr(n) { 0.5 + n.sqrt -> floor + n }
{|i| nonsqr(i) }.map(1..22).join(' ').say

{ |i|
  if (nonsqr(i).is_sqr) {
     die "Found a square in the sequence: #{i}"
  }
} << 1..1e6
```