英语词汇“triangular numbers”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	triangular numbers
释义	triangular numbers noun plural : the successive sums n(n + 1)/2 where n = 1, 2, 3, ... of the first n natural numbers 1, 3, 6, 10, 15, … representable by dots arranged in triangles
随便看	conehead conehead rivet cone-in-cone cone joint cone key conelet conelrad cone mandrel cone mill conenose cone-nose bug cone-nosed bug cone number cone of origin cone of silence conepate conepatl conepatus cone pepper cone-plant cone pulley coner cones cone sheet cone shell

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