This is supported natively in LyX; there's no need for the tricks in the other answers.

In the following:


First item

(a) Subitem

More of the first item
Second item


Make a separate paragraph for each, including the "more of the first item" one. Set its paragraph style to normal (like if it were not part of any list), and press tab to indent it (like you already did to subitem). It should all now look correct both in LyX and in the PDF output.

Lyx itemize returning to last number
I have this sequence :
 4,12,24,48,240,720,....

I order to find nth term of this sequence , can we represent this sequence as a function of n.
