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A125754 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 an integer solution, n is a term in the sequence. 5
2, 4, 10, 17, 18, 20, 24, 36, 42, 140, 145, 170, 200, 292, 561, 594, 660, 682, 792, 1059, 1136, 1553, 1800, 2340, 2730, 4150, 4274, 4297, 4308, 4389, 4433, 4490, 4634, 4696, 4705, 4741, 4804, 4876, 5133, 5164, 5218, 5254, 5400, 5409, 5668 (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: A238720 A264585 A077635 * A097870 A244474 A301739
KEYWORD
nonn
AUTHOR
David Applegate, Feb 02 2007
STATUS
approved

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Last modified June 25 13:13 EDT 2024. Contains 373705 sequences. (Running on oeis4.)