I am looking at this formula
I want to first make sure that I understand the principle. This is saying that, if I wanted to find out all the ways I could order the letter of the alphabet into a 26-letter string, then the answer is 26!.
If the formula for permutations of size k is this: k-permutations = n! / (n-k)!
Then, why isn't the formula for permutations of size 1 this: n! / (n-1)!