{"description":"http://projecteuler.net/index.php?section=problems&id=125 2\u4e57\u548c\u306e\u516c\u5f0f\u3092\u4f7f\u3048\u3070\u3001 m2 + \u2026 + n2 = n(n+1)(2n+1) / 6 - (m-1)m(2m-1) / 6 \u3042\u3068\u306f\u56de\u6587\u6570\u306e\u5224\u5b9a\u3092\u3059\u308b\u3060\u3051\u3067\u3059\u3002","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100713%2Fp1\" title=\"Project Euler 125 - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","author_url":"https://blog.hatena.ne.jp/inamori/","url":"https://inamori.hateblo.jp/entry/20100713/p1","provider_name":"Hatena Blog","version":"1.0","published":"2010-07-13 00:00:00","width":"100%","title":"Project Euler 125","blog_url":"https://inamori.hateblo.jp/","categories":["PE","\u6570\u5b66","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"provider_url":"https://hatena.blog","blog_title":"inamori\u2019s diary","author_name":"inamori","image_url":null}