Antonyms for the phrase "are in sequence" would be words or phrases indicating a lack of order or organization. Some possible antonyms include random, haphazard, disorganized, chaotic, or irregular. For example, if a group of numbers is not arranged in any particular order, they could be described as random rather than in sequence. Similarly, if a series of events occurs without any clear pattern or plan, they might be described as haphazard or chaotic. In contrast, if something is in sequence, it implies that there is a particular order or logic to its arrangement.