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 A043529 Number of distinct base 2 digits of n. 5
 1, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA This is 2 unless n = 2^k - 1 for some k in which case it is 1. MAPLE A043529 := proc(n): if type(ln(n+1)/ln(2), integer) then 1 else 2 fi: end proc: seq(A043529(n), n=0..90); # Johannes W. Meijer, Sep 14 2012 CROSSREFS Contribution from Johannes W. Meijer, May 24 2009: (Start) Factor of A160466. Cf. A007456 and A081729. (End) Sequence in context: A083952 A214860 A160242 * A201219 A080942 A099812 Adjacent sequences:  A043526 A043527 A043528 * A043530 A043531 A043532 KEYWORD nonn,base,easy AUTHOR EXTENSIONS First term added and offset changed by Johannes W. Meijer, May 15 2009 STATUS approved

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