How do I count by increments in Microsoft Excel 2007?

You may be wondering how to make a list in excel count from one specified number to another in user defined increments. Well, I recently had to use this application myself and this is the format I created. A user enters the number to start counting from in the first yellow square, the number to end at in the next square, and finally, in what increments they would like to count up at. Here is the driving formula:

=IF(I2="","",IF(I2+1*$F$1<=$D$1,I2+1*$F$1,"")) and =B1 in cell I2.

Pictured below are two examples.