plural of Catalan number

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).

plural of abbreviated number

A number which has had significant figures omitted beyond a certain point to make calculations easier; rounded number.

(mathematics) The number of distinct meanders of a given order.

plural of meandric number

An extremely large number that is an upper bound on the solution to a certain problem in Ramsey theory.

plural of distributive number

(seduction community) To end a pickup of a woman by getting her telephone number.

(seduction community) The successful acquisition of a woman's telephone number at the end of a pickup attempt.