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no_three_in_line_le

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For $N \leq 60$, this has been verfied with computers.

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Lean 4 Statement 
theorem no_three_in_line_le {N : ℕ} (hN : 3 ≤ N) (hN' : N ≤ 60) :
    NoKInLineFor 3 N
ID: GreensOpenProblems__72__no_three_in_line_le
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