Permutations without repetitions (exclude repeated permutations)
137471
Permutations of a string with duplicate characters
142477
Closed-form expression for the number of $k$-permutations of length $n$. Duplicates allowed!
133497
Group Membership Test for Permutations
83837
Odd/Even Permutations
37331
Prove that every set with more than one element has a permutation without fixed points
59087
permutations of two lists in python
122389
How can I generate a list of all possible permutations of several letters?
39353
Matrices that can only be permutation matrices
60416
Finding a permutation, and number of, from powers of the permutation
134440
An unexpected application of non-trivial combinatorics
51724
Calculate Nth multiset combination (with repetition) based only on index
41008
how many permutations of {1,2,...,9}
107964
Simple combinatorics problem.
127210
Is there any pre-built method for finding all permutations of a given string in JavaScript?
9411
Number of permutations of $n$ elements where no number $i$ is in position $i$
12749
How to generate all possible combinations of vectors without caring for order?
3568
Fast way to get a position of combination (without repetitions)