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A199817
Odd numbers producing 10 even numbers in the Collatz iteration.
2
11, 35, 113, 341
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..4.
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
Adjacent sequences:
A199814
A199815
A199816
*
A199818
A199819
A199820
KEYWORD
nonn
AUTHOR
Vincenzo Librandi
, Nov 12 2011
STATUS
approved
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Last modified May 20 08:56 EDT 2024. Contains 372705 sequences. (Running on oeis4.)