If you figure out (say) 10, then stop displaying them once the distance gaps get suddenly a lot bigger. So if someone is real close to 2, moderately close to another 3 and quite far from the next, they see 5. But if someone is moderately close to only 4, they see 4. And if someone is quite a ways from 3 and quite a long way from the next, they see 3.
Wade.