Sequence[, , ... ] represents a sequence of arguments to be spliced automatically into any function.
Example: f[a, Sequence[b, c]] .
Sequence objects will automatically be flattened out in all functions except those with attribute SequenceHold or HoldAllComplete.
See Section 2.2.11.
See also: FlattenAt, BlankSequence, SlotSequence, List, Listable.
New in Version 3.