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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A121510 Conjectured to be complete list of cycle lengths for 3x+1 (or Collatz) problem. 2 1, 2, 3, 5, 18 (list; graph; refs; listen; history; text; internal format) OFFSET 1,2 LINKS Table of n, a(n) for n=1..5. CROSSREFS Sequence in context: A253646 A004249 A268210 * A132346 A284530 A041293 Adjacent sequences: A121507 A121508 A121509 * A121511 A121512 A121513 KEYWORD nonn AUTHOR Daniel Asimov (dasimov(AT)earthlink.net), Sep 17 2006 STATUS approved

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Last modified August 18 11:16 EDT 2024. Contains 375265 sequences. (Running on oeis4.)