The rest value refers to the duration of a musical note or rest. In this sequence, the rest value is getting longer with each term. The first term, "Sixteenth," represents a very short duration, followed by "Eighth," which is twice as long. Then comes "Quarter," which is twice as long as an eighth note. "Half" is twice as long as a quarter note, and finally, "Whole" is twice as long as a half note. Therefore, the next term in the sequence would be "Eighth," as it continues the pattern of doubling the duration.