In mathematics, a sequence is an ordered list of objects.

Like a set, it contains members, and the number of them are called the length of the sequence.

Unlike a set, order matters, and exactly the same, elements can appear multiple times at different positions in the sequence.

Williamsburg Bridge, New York

Moment

Coney Island, Brooklyn, New York

New York, USA

Mangrove landscape in Celestun National Park, Yucatán, México.