A161023 Collatz trajectory starting at 35655.

35655, 106966, 53483, 160450, 80225, 240676, 120338, 60169, 180508, 90254, 45127, 135382, 67691, 203074, 101537, 304612, 152306, 76153, 228460, 114230, 57115, 171346, 85673, 257020, 128510, 64255, 192766, 96383, 289150, 144575, 433726

Offset

0,1

Comments

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

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

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

At step 321 becomes periodic: 4 2 1 4 2 1 4 2 1 ... - N. J. A. Sloane, Jul 27 2019

Links

R. Zumkeller, Table of n, a(n) for n = 0..323

Index entries for sequences related to 3x+1 (or Collatz) problem

Index entries for linear recurrences with constant coefficients, signature (0,0,1).

Mathematica

NestWhileList[If[EvenQ[#], #/2, 3#+1]&, 35655, #>1&] (* Harvey P. Dale, Apr 28 2016 *)

Crossrefs

Cf. A008884.

Sequence in context: A204666 A163680 A172712 * A252920 A156405 A065611

Adjacent sequences: A161020 A161021 A161022 * A161024 A161025 A161026

Keyword

nonn,look,easy

Author

Reinhard Zumkeller, Jun 03 2009

Extensions

Edited by N. J. A. Sloane, Jul 27 2019

Status

approved