I need a function for the following. These are not exact numbers, so a function that can closely calculate these will be perfect, thanks in advance. Function meaning: f(x)= or y= x : 0, 1, 2, 3, 4, 5

I need a function for the following.

These are not exact numbers, so a function that can closely calculate these will be perfect, thanks in advance.

Function meaning:

f(x)=

or y=

x : 0, 1, 2, 3, 4, 5, 6, 24

y : 1, 1.3, 3.1, 5.9, 9.8, 15.3, 22. 9, 5082.2