The group name is SEVENTEEN in addition of the 13 members + 3 sub-units + 1 group = 17.

SEVENTEEN 세븐틴 is a South Korean boy group formed by PLEDIS Entertainment (part of HYBE Labels). Seventeen has 13 members: S.Coups, Wonwoo, Mingyu, Vernon (hip hop sub-unit), Woozi, Jeonghan, Joshua, DK, Seungkwan (vocal sub-unit), Hoshi, Jun, The8, and Dino (performance sub-unit). Seventeen debuted on May 26, 2015 with the mini album “17 Carat” and title track “Adore You“.