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A104104 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)A(k) if a(k) = 0, A(k+1) = A(k)B(k) if a(k) = 1. 5
1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
f[l_]:=Join[l, If[l[[Log[2, Length[l]]+1]]==0, l, 1-l]]; Nest[f, {1}, 7] (* Ray Chandler, Apr 05 2009 *)
CROSSREFS
Sequence in context: A030658 A187950 A112539 * A188467 A039983 A152490
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Mar 04 2005
EXTENSIONS
Edited and extended by Ray Chandler, Apr 05 2009
STATUS
approved

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Last modified April 16 18:12 EDT 2024. Contains 371750 sequences. (Running on oeis4.)