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:
Permutations with repetition cropped.svg Permutations of elements in lexicographic order and derived permutations with repetition Inkscape fl Permutations with repetition svg UTC Permutations with repetition svg Matecode derivative work Quartl crop left column Quartl Permutationswithrepetition svg Watchduck Commons Copyrigh