Number of distinct strings reachable by at most 2 swaps
73575
Number of pairs of strings satisfying the given condition
107964
Simple combinatorics problem.
116647
The number of different ways to choose $k$ out of $n$ unique items
154445
balanced Shortest[] and string-patterns
135836
How to count of sub-string occurrences?
134440
An unexpected application of non-trivial combinatorics
48605
Distinct digits in a combination of 6 digits
126025
Computing the inverse of a permutation
65307
Simple combination/probability question based on string-length and possible-characters
116605
Generate list of all possible permutations of a string
120748
Combination With Finite Replacements
9411
Number of permutations of $n$ elements where no number $i$ is in position $i$
137072
Number Of Distinct Paths In A Rectangular Grid
153721
Conjugating a permutation
83837
Odd/Even Permutations
20221
Combinatorics - Removing Double Counted Cases
74036
Count the occurrences of DISTINCT values