Y by
A permutation of the integers
is a list
where each one of the numbers appears exactly once. For each permutation we define the partial sums.





How many of these permutations satisfy that none of the numbers
is divisible by
?







How many of these permutations satisfy that none of the numbers


This post has been edited 1 time. Last edited by parmenides51, Sep 7, 2022, 12:40 AM