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A121510
Conjectured to be complete list of cycle lengths for 3x+1 (or Collatz) problem.
2
1, 2, 3, 5, 18
OFFSET
1,2
CROSSREFS
Sequence in context: A253646 A004249 A268210 * A132346 A284530 A041293
KEYWORD
nonn
AUTHOR
Daniel Asimov (dasimov(AT)earthlink.net), Sep 17 2006
STATUS
approved