<h2 id="heading-url">URL</h2>
<a target="_blank" href="https://leetcode.com/problems/count-total-number-of-colored-cells/description/?envType=daily-question&amp;envId=2025-03-05">Count Total Number of Colored Cells - LeetCode</a>
<h2 id="heading-code">Code</h2>
<a target="_blank" href="https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202503/count_total_number_of_colored_cells/main.fsx">https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202503/count_total_number_of_colored_cells/main.fsx</a>
<pre><code class="lang-fsharp">let coloredCells (n: int) : int64 =
 seq { 1..n }
 |&gt; Seq.fold (fun (acc: int64) n -&gt; acc + 2L * (2L * int64 n - 1L)) (-2L * int64 n + 1L)
</code></pre>

## URL

[Count Total Number of Colored Cells - LeetCode](https://leetcode.com/problems/count-total-number-of-colored-cells/description/?envType=daily-question&envId=2025-03-05)

## Code

[https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202503/count\_total\_number\_of\_colored\_cells/main.fsx](https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202503/count_total_number_of_colored_cells/main.fsx)

```fsharp
let coloredCells (n: int) : int64 =
    seq { 1..n }
    |> Seq.fold (fun (acc: int64) n -> acc + 2L * (2L * int64 n - 1L)) (-2L * int64 n + 1L)
```

LeetCode 2579. Count Total Number of Colored Cells in F#

URL

Code