Source: wikibot/lah-number

= Lah number
{wiki=Lah_number}

The Lah number, denoted as \\( L(n, k) \\), is a combinatorial number that counts the number of ways to partition \\( n \\) labeled objects into \\( k \\) non-empty unlabeled subsets. It can be derived from Stirling numbers of the second kind, denoted \\( S(n, k) \\), which counts the ways to partition \\( n \\) labeled objects into \\( k \\) non-empty labeled subsets.