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                        Permutations with repetition

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                        Computes the number of permutations with repetitions. That is, given a non-negative integer n and a sequence of one or more additional non-negative integers n1,...,nr such that n1+⋯+nr=n, this functions returns the number of permutations for n elements taken from r different elements and such that the i-th element repeats ni times.

                        Syntax

                        permutations_with_repetition(Integer, Integer, ..., Integer)
                        
                        permutations_with_repetition(Integer, List | Vector)
                        

                        Description

                        Given an integer n and a set of integers n1,...,nr satisfying the conditions above, computes the number of permutations for n elements taken from r different elements and such that the i-th element repeats ni times.

                        Given an integer n and a list or vector of n elements, comprised of r different elements and such that the i-th element repeats ni times, returns a list of all the different distinct permutations (in lexicographical order).

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                        Permutations with repetition

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