freeCodeCamp/guide/chinese/certifications/coding-interview-prep/project-euler/problem-141-investigating-progressive-numbers-n-which-are-also-square/index.md

---
title: Investigating progressive numbers, n, which are also square
localeTitle: 研究渐进数n，它们也是正方形
---
## 问题141：调查渐进数n，它们也是正方形

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