Antonyms for the word "followed sequence" would be irregular, nonsequential, haphazard, random, chaotic, disordered, jumbled, or unarranged. These terms describe a lack of order or predictability and imply that events or actions are not occurring in a specific or predetermined order. In contrast, antonyms such as organized, methodical, systematic, or structured imply a clear sense of order and a process or plan in place. Depending on the context, the use of antonyms like irregular or disordered could suggest a sense of confusion, while employing antonyms like organized or structured might convey a sense of control or intention.