This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Permutationen und Derangements. en Number of npermutations and complete derangements of elements permutations where none of its elements remains at its initial place de Zahl der Permutationen und totalen Derangements von Elementen Permutationen bei denen keines der Elemente an seinem ursprnglichen Platz verbleibt own Qniemiec colspan