Catalan number
(organic chemistry, countable) Any of various hydroxy, carbonyl or carboxylic acid derivatives of carotenes. / (organic chemistry, uncountable) Lutein.
plural of devlog
simple past tense and past participle of browse
In combinatorial mathematics, any of a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects; the nᵗʰ Catalan number is equal to (2n choose n) over (n+1).
n組の括弧を正しく対応させる方法の総数はカタラン数によって与えられる。
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