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<p>We fit three copies of the finite sum of initial triangular numbers into a rectangle.</p>

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Proof Without Words: Sums of Triangular Numbers

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Stephan Berendonk

摘要

We fit three copies of the finite sum of initial triangular numbers into a rectangle.