[seqfan] Re: Binary Complement Sequences

[Tim Peters]

[Allan Wechsler]
> It would be worthwhile comparing the trajectory plots of 819991 with those
> for 425750. For all we know, the trajectories merge around the seventeen
> millionth step, and if they do, it won't be necessary to run 819991 to
> completion. In fact, 819991 might be an early iterate of 425750.

Tom already did that. In fact, apply a single step to 425750, and you
get 819991. So 819991 hits 0 one step sooner than 425750 does.

I've been keeping track of these for seeds that take over a billion
steps.The first two have been reported here before:

- 819991 is the first iterate of 425720

- iterating 717657 for 46 steps coincides with 820560's successor.

- 829974'a successor is the 14th successor of 836375

FYI, 829974 takes 4,327,838,170 iterations to reach 0.