Source: wikibot/bell-number
= Bell number
{wiki=Bell_number}
A Bell number is a number that represents the count of different ways to partition a set into non-empty subsets. More formally, the \\( n \\)-th Bell number, denoted as \\( B_n \\), counts the number of ways to partition a set of \\( n \\) elements. For example: - \\( B_0 = 1 \\): There is one way to partition an empty set (the empty partition).