Definition of SEQUIN
1: an old gold coin of Italy and Turkey
2: a small plate of shining metal or plastic used for ornamentation especially on clothing
noun \ˈsē-kwən(t)s, -ˌkwen(t)s\
Definition of SEQUENCE
1: a hymn in irregular meter between the gradual and Gospel in masses for special occasions (as Easter)
2: a continuous or connected series
[redacted because the definitions took up too darned much space]
The raspberry beret is covered in sequins.
This game is called Sequence.
To make a long story short, sequins ≠ sequence. That is all.