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A104105
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a(1) = 1, if A(k) = sequence of first 2^k -1 terms and if B(k) is A(k) with 0's and 1's exchanged, then A(k+1) = A(k),1,B(k) if a(k) = 0, A(k+1) = A(k),0,B(k) if a(k) = 1.
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4
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1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| f[l_]:=Join[l, 1-{l[[Log[2, Length[l]+1]]]}, 1-l]; Nest[f, {1}, 7] (*Chandler*)
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CROSSREFS
| Cf. A104104, A104106, A104107, A104108.
Sequence in context: A143580 A011749 A188578 * A143221 A126999 A120527
Adjacent sequences: A104102 A104103 A104104 * A104106 A104107 A104108
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KEYWORD
| easy,nonn
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AUTHOR
| Leroy Quet, Mar 04 2005
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EXTENSIONS
| Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Apr 05 2009
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