"whole number" does not exclude negative numbers and so you would have an infinite number of solution pairs.
Is this the intention or was Terry right when he assume that 0 would be acceptable but negative numbers are not?
In case that negative numbers are OK, too, you would have to provide a limit - either a lower limit for a (runs from 2 down) or, as in the screenshot below, an upper limit for b (runs from 3 upwards):
Or are you looking for some kind of brute force attack?
Just a different take on it. Solutions for a and b must lie on a line for any value of 't'. So we can use y=m*x+b. b>a only for t<2.5.
