236975164805domain: NAppears in sequencesTotal number of ordered k-tuples (k=0..n) of distinct elements from an n-element set: a(n) = Sum_{k=0..n} n!/k!.at n=14A000522Squarefree part of the total number of arrangements of a set with n elements.at n=14A222637Nearest integer to e*n!.at n=14A370973