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A161023 Collatz trajectory starting at 35655. 6

%I #16 Oct 13 2022 14:28:31

%S 35655,106966,53483,160450,80225,240676,120338,60169,180508,90254,

%T 45127,135382,67691,203074,101537,304612,152306,76153,228460,114230,

%U 57115,171346,85673,257020,128510,64255,192766,96383,289150,144575,433726

%N Collatz trajectory starting at 35655.

%C 35655 = A060412(7); a(A006577(35655)) = a(323) = 1.

%C a(n) = A161021(n-153) for n with 297 <= n <= 323;

%C a(n) = A161022(n-100) for n with 308 <= n <= 323.

%C At step 321 becomes periodic: 4 2 1 4 2 1 4 2 1 ... - _N. J. A. Sloane_, Jul 27 2019

%H R. Zumkeller, <a href="/A161023/b161023.txt">Table of n, a(n) for n = 0..323</a>

%H <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,1).

%t NestWhileList[If[EvenQ[#],#/2,3#+1]&,35655,#>1&] (* _Harvey P. Dale_, Apr 28 2016 *)

%Y Cf. A008884.

%K nonn,look,easy

%O 0,1

%A _Reinhard Zumkeller_, Jun 03 2009

%E Edited by _N. J. A. Sloane_, Jul 27 2019

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Last modified April 24 07:05 EDT 2024. Contains 371920 sequences. (Running on oeis4.)