{"image_url":null,"author_name":"inamori","height":"190","url":"https://inamori.hateblo.jp/entry/20100105/p1","version":"1.0","blog_title":"inamori\u2019s diary","title":"Project Euler 44\uff082\uff09","type":"rich","author_url":"https://blog.hatena.ne.jp/inamori/","published":"2010-01-05 00:00:00","categories":["PE","\u6570\u5b66","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"provider_url":"https://hatena.blog","description":"\u5c11\u3057\u6570\u5b66\u7684\u306b\u30a2\u30d7\u30ed\u30fc\u30c1\u3057\u307e\u3057\u3087\u3046\u3002 \u6c42\u3081\u308bD\u3092\u3001 D = Pl = Pk - Pj \u3068\u3059\u308b\u3068\u3001 l(3l - 1) = k(3k - 1) - j(3j - 1) l(3l - 1) = (k - j)(3k + 3j - 1) k - j \u3068 3k + 3j - 1 \u306f l(3l - 1) \u306e\u7d04\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5236\u7d04\u304c\u3044\u308d\u3044\u308d\u3042\u308a\u307e\u3059\u30023\u306e\u56e0\u5b50\u306f\u3059\u3079\u3066 k - j \u304c\u53d7\u3051\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001k - j \u3068 k + j \u306f\u5076\u5947\u304c\u540c\u3058\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3088\u3063\u3066\u3001k - j \u3068 3k + 3j - 1 \u306f\u5076\u5947\u304c\u53cd\u5bfe\u306b\u306a\u308a\u307e\u3059\u3002\u3059\u306a\u308f\u3061\u30012\u306e\u56e0\u5b50\u306f\u3069\u3061\u3089\u304b\u304c\u3059\u3079\u3066\u53d7\u3051\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100105%2Fp1\" title=\"Project Euler 44\uff082\uff09 - 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>","provider_name":"Hatena Blog","blog_url":"https://inamori.hateblo.jp/","width":"100%"}