Excel pull sequence

[Big1]

I currently have this on my excel sheet:

=Sheet2!C21
=Sheet2!C24
=Sheet2!C27

I want to pull it down so the sequence continues:

=Sheet2!C30
=Sheet2!C33
=Sheet2!C36
(...)

How do I do that?

Thanks!

[Ace_XL]

In your first cell use

=INDEX(Sheet2!C:C,ROW(A1)*3+18)

Copy down