A104107 - OEIS

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A104107

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) = 0, A(k+1) = A(k),0,B(k) and c(k+1)= 2*c(k)+1 if a(k) = 1.

1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

MATHEMATICA

f[l_]:=Join[l, If[l[[Floor[Log[2, Length[l]]]+1]]==0, {}, {0}], 1-l]; Nest[f, {1}, 7] (* Ray Chandler, Apr 05 2009 *)

CROSSREFS

Cf. A104104, A104105, A104106, A104108.

Sequence in context: A029692 A309849 A071906 * A120532 A373156 A320106

Adjacent sequences: A104104 A104105 A104106 * A104108 A104109 A104110

KEYWORD

easy,nonn

AUTHOR

Leroy Quet, Mar 04 2005

EXTENSIONS

Edited and extended by Ray Chandler, Apr 05 2009

STATUS

approved