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 A220140 Length of the Collatz iteration (3x+1) starting at A220139(n). 3
 1, 2, 8, 13, 12, 99, 154, 153, 77, 98, 97, 264, 210, 235, 234, 114, 113, 218, 159, 158, 157, 350, 393, 392, 329, 328, 327, 311, 310, 309, 308, 307, 270, 455, 454, 435, 434, 632, 607, 606, 605, 604, 603, 602, 591, 573, 572, 644, 643, 779, 723, 717, 716, 813 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS T. D. Noe, Table of n, a(n) for n = 1..10000 MATHEMATICA Collatz[n_] := NestWhileList[If[EvenQ[#], #/2, 3 # + 1] &, n, # > 1 &]; c = {1}; t = {}; Do[AppendTo[t, Length[c]]; c = Collatz[Max[c] + 1], {100}]; t CROSSREFS Sequence in context: A120000 A067678 A134905 * A344152 A030389 A136738 Adjacent sequences: A220137 A220138 A220139 * A220141 A220142 A220143 KEYWORD nonn AUTHOR T. D. Noe, Jan 02 2013 STATUS approved

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Last modified March 22 09:02 EDT 2023. Contains 361423 sequences. (Running on oeis4.)