[seqfan] Re: Rank of a prime (Collatz/Syracuse)
N. J. A. Sloane
njas at research.att.com
Mon Feb 9 17:25:52 CET 2009
Bob, sorry I missed your version! But I see now that you
did not use the SubmitN.html submit form (instead you put
it in an email message to the seqfan list).
Also your definition was just a place-holder (all you said was
%N A000001 Number of iterations to repeat a term.
, without saying what was being iterated).
Also now that I look at it, I don't agree with all your values!
You: 2,3,4,7,5,31,8,55,4,33,6,...
Me: 1,2,3,6,4,31,7,56,4,34,5 (based on email from J.T.)
RJM: 1,2,3,6,4,31,7,55,4,33,5,
My definition is this: if the trajectory of n goes like this
0 1 2 3 4 5 6 7 8 ...
n * * * M * * * M ...
and we see a repeat for the first time at step 8,
then a(n) would be 8
Neil
More information about the SeqFan
mailing list