A jump sequence is a group of jumps performed in succession, that consists of two jumps of any number of revolutions, beginning with any listed jump, immediately followed by an Axel type jump with a direct step from the landing curve of the first jump to the take-off curve of the Axel jump.
Before the 2018/19 season, jump sequence was any group of jumps as long as they are connected by only a hop or an unlisted jump (and the rhythm is maintained).