it remains only theoretical and probabilistic the distribution is obviously not linear if not on range #64 by adding an additional character to 16jY7qLJnx ex H ==> 16jY7qLJnxH it should come out <1 but in this case there are 2 whereas for 16jY7qLJnx N or P only one address but it stands
I still do not understand what you are asking/implying.
In the 64-bit range, there should be an estimated 2,483 addresses that start with 16jY7qLJnx.
You are looking at a very small sample size in the list of addresses you posted.