Fixed points free permutations
130598
Faster derangements?
41294
Permutation module of $S_n$
134440
An unexpected application of non-trivial combinatorics
19146
Showing that $f$ has exactly one fixed point
46036
Logic for decomposing a permutation into different products composed of transpositions
155926
Prove there are k consecutive non-squarefree integers
108747
A simple permutation question - discrete math
101751
The number of words that can be made by permuting the letters of _MATHEMATICS_ is
114752
Number of permutations of a specific cycle decomposition
151681
arbitrarily long sequences without perfect powers
38809
In how many ways can the letters of word $PERMUTATIONS$ be arranged if there are always 4 letters between P and S?
58508
Number of ways to pair off $2n$ points such that no chords intersect
96585
Sums and permutation
8645
A formula for bit strings with no $k$ consecutive $1$'s using generating functions
101719
Finding the n-th lexicographic permutation of a string
132118
Computing the $n^{\textrm{th}}$ permutation of bits.
112362
fixed point problem for orthogonal transformation