SOLUTION: What is the nth rule for 0,{{{1/4}}},{{{2/5}}},{{{3/6}}}?

0,,,

List the terms and the values for n:

n  nth term
1    0
2    
3    
4    

Notice that in the 2nd, 3rd and 4th terms, the numerator
is 1 less than the value of n, and the denominator is 2
more than the value of n. 

That will also be the case with the first term if
we consider the 0 as  

1    
2    
3    
4    

So the fifth term is .  Therefore, the rule is

nth term = 

Edwin