Is there any formula for the following permutation?
117658
A set with n elements has 2^n subsets
100581
Extended permutations, how does it work mathematically if you keep adding categories?
25744
Multiplication in Permutation Groups Written in Cyclic Notation
48019
Explanation circular permutation
46999
How many fixed points in a permutation
142477
Closed-form expression for the number of $k$-permutations of length $n$. Duplicates allowed!
6204
How many permutations of $\{1, \ldots, n\}$ exist such that none of them contain $(i, i+1)$ (as a sequence) for $i \in {1,...,(n-1)}$?
107964
Simple combinatorics problem.
27610
Given the permutation $\sigma=\left(\begin{array}{ccccc} 1&2&3&4&5\\ 3&1&2&5&4 \end{array}\right)$
133497
Group Membership Test for Permutations
70967
Permutation with prime order, fixed point
41294
Permutation module of $S_n$
75804
Is this permutation-sum problem NP-complete?
150281
Am I on the right track to figure out this combinatorics problem?
49912
Generating ordered combination of numbers
111966
The exact difference between a permutation and a substitution
20722
Fixed points in random permutation