# Numbers Relation Puzzle

I've written a numbers relation puzzle, I'd like to share it with you and see what you fellas think.
------ Try to find the relation between the numbers------
Good to know: there are 2 parameters involved in the equation.
1,7 = 7
3,5 = 405
2,3 = 12
4,6 = 24576
3,9 =

$$3,9 = 729$$
It looks like $$a,b = a^{2a-2} \times b$$ so that $$3,9 = 3^4 \times 9 = 729$$