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A104108
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a(1) = 1, c(1)=1, if A(k) = sequence of first c(k) terms and if B(k) is A(k) with 0's and 1's exchanged, then A(k+1) = A(k)B(k) and c(k+1)= 2*c(k) if a(k) = 1, A(k+1) = A(k),0,B(k) and c(k+1)= 2*c(k)+1 if a(k) = 0.
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4
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1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| f[l_]:=Join[l, If[l[[Floor[Log[2, Length[l]]]+1]]==1, {}, {0}], 1-l]; Nest[f, {1}, 7] (*Chandler*)
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CROSSREFS
| Cf. A104104, A104105, A104106, A104107.
Sequence in context: A102243 A173859 A202108 * A190610 A089024 A168553
Adjacent sequences: A104105 A104106 A104107 * A104109 A104110 A104111
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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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