Posted:

**Nov 16, 2019 7:18 pm**I might have a longer look.

Not convinced I was onto anything fruitful. At least the k = 0 case is obvious, it's the higher ones that I could see no clear way towards either from properties of combinatorics/pascal's triangle or a simple mathematical induction.

Not convinced I was onto anything fruitful. At least the k = 0 case is obvious, it's the higher ones that I could see no clear way towards either from properties of combinatorics/pascal's triangle or a simple mathematical induction.