How many fix point free permutations of 5 elements are there?
132129
Derivation of derangement with inclusion-exclusion
17268
Cycles in permutations of a given size
107010
How many elements of order $k$ are in $S_n$?
56135
Find all permutations with a condition
126025
Computing the inverse of a permutation
93459
Number of permutations of unspecified length
147766
Sum of Permutations from 0 to n
77500
How to remove repeated permutations?
130291
Shortest sequence containing all permutations
57221
counting the number of elements in a conjugacy class of $S_n$
58508
Number of ways to pair off $2n$ points such that no chords intersect
155831
What are the total number of ordered permutations of a list of elements (possibly repeated)?
143427
Counting existing permutations in R
131863
Permutation question on alphabets
107964
Simple combinatorics problem.
98313
Number of possible permutations of n1 1's, n2 2's, n3 3's, n4 4's such that no two adjacent elements are same?
149609
Conditions on cycle types for permutations to generate $S_n$