Catalan number

短语

词形变化

Catalan numbers 复数 Catalan numbers

释义与例句

n.
  1. 1.

    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).

    Cₙ — the nᵗʰ Catalan number — could be described as the number of distinct ways in which a sequence of n + 1 numbers could be associated by means of some specified binary operator.

词源

Named after the Belgian mathematician Eugène Catalan (1814–1894).

来源：wiktionary