theorem proved term proof

`sum_of_squares_thirteen`

No prose has been written for this declaration yet. The Lean source and graph data below render without it.

formal statement (Lean)

1561theorem sum_of_squares_thirteen : (13 : ℕ) = 2^2 + 3^2 := by native_decide

Term-mode proof.

1562
1563/-- 17 = 1² + 4². -/