Wiktionary
nonsequential
a. Not sequential; not in any regular sequence
Usage examples of "nonsequential".
Ted Nelson to describe the writing done in the nonlinear or nonsequential space made possible by the computer.
After all, in the space of half a minute Darsoss had studied a column of fifteen separate and nonsequential numbers accounting for some forty-odd digits, and then had been able to write them down from memory exactly as they had been presented to him.
The volatile component of the tholin was examined by sequential and nonsequential pyrolytic gas chromatography and mass spectrometry.