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A125756 Numbers n whose reverse binary representation has the following property: let a 0 mean "halving" and a 1 mean "k -> 3k+1". The number describes an operation k -> f_n(k). If the equation f_n(k) = k has a positive integer solution, n is a term in the sequence. 4
4, 36, 140, 145, 200, 292, 1059, 1136, 1553, 1800, 2340, 4150, 4274, 4297, 4308, 4389, 4433, 4490, 4634, 4696, 4705, 4741, 4804, 4876, 5133, 5164, 5218, 5254, 5400, 5409, 5668, 5712, 5761, 6244, 6290, 6312, 6448, 6466, 6662, 6800, 6976 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Suggested by A125626.
Note that f_n(x) is always a linear function of x.
LINKS
CROSSREFS
Sequence in context: A374387 A060783 A296948 * A173961 A340661 A035287
KEYWORD
nonn
AUTHOR
David Applegate, Feb 02 2007
STATUS
approved

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Last modified July 23 04:10 EDT 2024. Contains 374544 sequences. (Running on oeis4.)