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A199817
Odd numbers producing 10 even numbers in the Collatz iteration.
2
11, 35, 113, 341
OFFSET
1,1
MATHEMATICA
Collatz[n_]:=NestWhileList[If[EvenQ[#], #/2, 3 #+1]&, n, #>1&]; t={}; Do[If[Length[Select[Collatz[n], EvenQ]] == 10, AppendTo[t, n]], {n, 1, 100000, 2}]; t
CROSSREFS
Cf. A131450.
Cf. A199636 (row 10).
Sequence in context: A297539 A323691 A368743 * A216034 A224790 A098116
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Nov 12 2011
STATUS
approved