Confirming if multiple rows of numbers run in sequence

Hello,

Please see attached.

I'd like Excel to run a check to see if a row of numbers runs in sequence.

*As in row 4, the numbers dont have to incriment each time
*As in row 2, there may be gaps in the data
*As in row 6, the data cant increase and then decrease. Each subsequent number must be the same or high than the previous
*There could be varying amounts of numbers per row, hence the results being in column R

As an added bonus it'd be nice to see where an error occurs, but just knowing theres an error (column R) is the primary goal.

Thanks