Combination-Counting problem
27218
How to use stars and bars for solving number of integral solutions to an equality?
75804
Is this permutation-sum problem NP-complete?
98744
How to distinguish between permutation and combination questions?
142978
combinatorics: sum of product of integer compositions
111954
Computing the cardinality of a combinatorial set
139039
Stars and Bars Combinatorics Problem
101642
Counting in a rectangular grid with obstacles
96585
Sums and permutation
149010
Finding Combinations to the provided Sum value
158708
Counting the adjacent swaps required to convert one permutation into another
24212
proving how many permutations exist.
85023
Permutation of n objects with restriction of adjacent pairs
45448
Minimum number of $k$-partitions of a set of size $n$ to enumerate all $n \choose k$ combinations
93748
Alternative to Subsets to generate k-combinations
74682
How should I solve combination addition like this?
120748
Combination With Finite Replacements
65843
Number of possible combinations of x numbers that sum to y