Remove "fixed" first and last page number on pagination

Hi all,
the problem I'm experiencing is that I can't find a built-in option to remove the first and last page number (not the "First" and "Last" buttons - the number ones). It is always fixed.

For example: http://live.datatables.net/yosavasa/
If you go to page 5, there are the buttons "First", "1", "4", "5", "6", "15" and "Last". I want to know if there's a way to remove the "1" and "15" buttons.

Thanks!