{"description":"30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0\u3001\u305d\u306e319\u3002Problem45 - Project Euler\u3002 \u4e09\u89d2\u6570, \u4e94\u89d2\u6570, \u516d\u89d2\u6570\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u751f\u6210\u3055\u308c\u308b. \u4e09\u89d2\u6570Tn=n(n+1)/2 1, 3, 6, 10, 15, ... \u4e94\u89d2\u6570Pn=n(3n-1)/2 1, 5, 12, 22, 35, ... \u516d\u89d2\u6570Hn=n(2n-1) 1, 6, 15, 28, 45, ... T285 = P165 = H143 = 40755\u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308b. \u6b21\u306e\u4e09\u89d2\u6570\u304b\u3064\u4e94\u89d2\u6570\u304b\u3064\u516d\u89d2\u6570\u306a\u6570\u3092\u6c42\u3081\u3088. id:banjun\u306e\u30b3\u30fc\u30c9\u304b\u3089\u5b66\u3093\u3060\u3053\u3068\u3060\u3051\u308c\u3069\u3082\u3001\u89e3\u306e\u516c\u5f0f\u7684\u306a\u3082\u306e\u3092\u4f7f\u3046\u3053\u3068\u3067\u3042\u308b\u6570N\u304c\u4e09\u89d2\u6570\u304b\u3069\u3046\u304b\u306e\u5224\u65ad\u304c\u3067\u304d\u308b\u3002 \u2026","url":"https://mzp.hatenadiary.org/entry/20080610/erlang","height":"190","author_name":"mzp","provider_url":"https://hatena.blog","blog_title":"\u307f\u305a\u3074\u30fc\u65e5\u8a18","title":"Problem45","provider_name":"Hatena Blog","blog_url":"https://mzp.hatenadiary.org/","author_url":"https://blog.hatena.ne.jp/mzp/","published":"2008-06-10 00:00:02","type":"rich","version":"1.0","image_url":null,"width":"100%","categories":["Erlang","30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmzp.hatenadiary.org%2Fentry%2F20080610%2Ferlang\" title=\"Problem45 - \u307f\u305a\u3074\u30fc\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>"}