Combinations            Combinations iterator
Partitions              Partitions iterator
Permutations            Permutations iterator
arrangements-package    arrangements: Fast Generators and Iterators for
                        Permutations, Combinations and Partitions
combinations            Combinations generator
ncombinations           Number of combinations
npartitions             Number of partitions
npermutations           Number of permutations
partitions              Partitions generator
permutations            Permutations generator
