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 A085144 a(0)=0, a(2n) = a(n)+1, a(2n+1) = -a(n). 5
 0, 0, 1, 0, 2, -1, 1, 0, 3, -2, 0, 1, 2, -1, 1, 0, 4, -3, -1, 2, 1, 0, 2, -1, 3, -2, 0, 1, 2, -1, 1, 0, 5, -4, -2, 3, 0, 1, 3, -2, 2, -1, 1, 0, 3, -2, 0, 1, 4, -3, -1, 2, 1, 0, 2, -1, 3, -2, 0, 1, 2, -1, 1, 0, 6, -5, -3, 4, -1, 2, 4, -3, 1, 0, 2, -1, 4, -3, -1, 2, 3, -2, 0, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Local maxima are a(2^k) = k, minima are a(2^k+1) = -k+1. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 PROG (Haskell) import Data.List (transpose) a085144 n = a085144_list !! n a085144_list = 0 : concat    (transpose [map negate a085144_list, map (+ 1) \$ tail a085144_list]) -- Reinhard Zumkeller, Mar 18 2015 CROSSREFS Zeros are in A085145. Cf. A004718, A010060, A059448. Sequence in context: A281048 A029352 A055168 * A156578 A171846 A097230 Adjacent sequences:  A085141 A085142 A085143 * A085145 A085146 A085147 KEYWORD sign,easy AUTHOR Ralf Stephan, Jun 20 2003 STATUS approved

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Last modified May 11 09:45 EDT 2021. Contains 343788 sequences. (Running on oeis4.)