Hi Everybody,
I am trying to find gaps in my time sequence.

Each successive row increases by 30 minutes. My time format appear as

00:15:00
00:45:00
01:15:00
01:45:00
02:45:00 ---
03:15:00
04:15:00 ---

I need to find every cell that is not the immediate successive and that skipped the 30 minutes difference.
Is there any way?

Thank you all in advance

Sal