Increment a numerical string

I see on the rosetta page there is a task for incrementing a numerical string, should I make it as a udf with several extra functions like how much to increment a number with E.g? lets say we want to increment 1 should there be options to increase it with an x amount of numbers? like incr 1 with 2, 3, 4 or maybe 5? So we will start with 1 if incremented with 2 it should be 1, 3, 5, 9, 11 etc.