{"author_url":"https://blog.hatena.ne.jp/mtsuyugu/","title":"problem 28","height":"190","description":"Problem 28 - Project Euler 21 22 23 24 25 20 7 8 9 10 19 6 1 2 11 18 5 4 3 12 17 16 15 14 13\u3053\u3046\u3044\u3046\u98a8\u306b\u6b63\u306e\u6574\u6570\u3092\u87ba\u65cb\u72b6\u306b 1001\u00d71001 \u306e\u30b5\u30a4\u30ba\u307e\u3067\u4e26\u3079\u3066\u3044\u3063\u305f\u3068\u304d\u5bfe\u89d2\u7dda\u4e0a\u306b\u3042\u308b\u6570\u306e\u5408\u8a08\u3092\u6c42\u3081\u308b\u554f\u984c\u3002\u307e\u305a n (n>1) \u9031\u76ee\u306e\u6570\u5b57\u306e\u4e26\u3073\u3092\u8003\u3048\u3066\u307f\u308b\u3002n \u9031\u76ee\u306e\u56db\u89d2\u306e\u4e00\u8fba\u306b\u3042\u308b\u6570\u306f 2n-1 \u500b\u3067\u3001\u6700\u5f8c\u306e\u6570\u306f (2n-1)^2 \u3060\u304b\u3089\u3001\u305d\u308c\u305e\u308c\u306e\u89d2\u306e\u5408\u8a08\u306f\u03a3{(2n-1)^2 - 2k(n-1)} (k = 0, 1, 2, 3)\u306b\u306a\u308b\u30021001 = 2n - 1 \u3092\u89e3\u304f\u3068 n = 501 \u3060\u304b\u2026","provider_name":"Hatena Blog","url":"https://mtsuyugu.hatenadiary.org/entry/20080712/1215873745","provider_url":"https://hatena.blog","version":"1.0","published":"2008-07-12 23:42:25","blog_url":"https://mtsuyugu.hatenadiary.org/","width":"100%","blog_title":"mtsuyugu\u306e\u65e5\u8a18","image_url":null,"author_name":"mtsuyugu","categories":["scheme","euler"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmtsuyugu.hatenadiary.org%2Fentry%2F20080712%2F1215873745\" title=\"problem 28 - mtsuyugu\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich"}