9823096307544

For the of the, the twelve group winners and the four best third-placed teams from the  have to be drawn against a runner-up of another group or one of the four other third-placed teams from the UEFA Champions League. The number of possible outcomes is !12 + 4 × !13 + 6 × !14 + 4 × !15 + !16 = 9823096307544. In reality, the actual number is almost always smaller, since teams of the same association cannot be drawn against each other.