Pascal's Triangle

Compute Pascal's triangle up to a given number of rows.

Visit the pascals-triangle exercise on Exercism to read the full instructions and download the exercise files.

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module PascalsTriangle

let rows size =
    let row i = List.scan (fun acc j -> acc * (i - j) / j) 1 [1 .. i - 1]
    List.map row [1..size]