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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 David Applegate, Table of n, a(n) for n = 1..101 CROSSREFS Cf. A125626, A125755, A125756, A125757, A125710, A125711. Sequence in context: A238720 A264585 A077635 * A097870 A244474 A301739 Adjacent sequences: A125751 A125752 A125753 * A125755 A125756 A125757 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.)