lean_workbook_plus_49452

Open

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

Find the 14th number of the Fibonacci sequence. (It starts with $1,1,2,3,5,8,13 \dots$ )

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_49452 : fib 14 = 377   :=  by sorry

Source