Hey everyone!

Just a small probelm: I'm doing some things in actionscript that require tweeing..... anyone know of a quick mathematical formula that will give me values that increase like a tween (ie small increments to large increments of gain) for example, an equation that
produces something akin to 1, 1.5, 2.5, 4, 6, 9, 13
etc.
But the thing is I;d like to be able to control the factor of inscrease..... say I want the values to jump sharply after a certain time, akin to tweening in or out...

- Thanks!