Seating Arrangement

There is a bar with 25 seats in a line. The people there are anti-social so when they walk in the bar, they always try to find a seat farthest away from others. If one person walks in and finds there is no seat which does not have all the adjacent seats empty, that person will walk away. The bar owner wants as many people as possible. The owner can tell the first customer where to sit. All the other customers will pick the farthest possible seat from others. So where should the first customer sit?

3 or 11

9 or 17

1 or 25

11 or 13

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