Fibonacci product

· John Cook · Sept. 16, 2026, 12:16 p.m.
Math Number theory mathematics Number theory Triangular Numbers Fibonacci Sequence
Summary
The blog post discusses a mathematical observation that the product of four consecutive Fibonacci numbers equals the product of two consecutive integers, exemplified by the equation 3 × 5 × 8 × 13 = 39 × 40. The author references a theorem related to triangular numbers and highlights its connection to Fibonacci numbers.
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