How to miss out a number in a list

From NeoWiki

It is possible to skip numbers entirely and start numbering where you want. What you have to do is hit Enter after your last numbered item. Then you go to the Format menu and choose Bullets and Numbering... and click on the Remove button at the bottom of the dialog box that appears. This terminates your current numbered list. Then you go to the Format menu and choose Bullets and Numbering... again and create a new numbered list and start it at whatever number you want. This is done on the Options tab, where it says Start at.

This method is doable, but has some potential side effects. For example, if you add a point to one of multiple numbered lists, you would have to go back and readjust all the lists which follow it.

(Tip from the OpenOffice.org forum)