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A123740
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Characteristic sequence for Wythoff AB-numbers A003623.
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6
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0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Left shifted sequence is the characteristic function of A035336, and also the second lowest digit of the Zeckendorf expansion of n. [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Jun 30 2009]
a(n) = A188009(n+2), n>=1. - Wolfdieter lang, Jun 27 2011.
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REFERENCES
| See references under A000201.
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FORMULA
| a(n)=1 if n=A(B(k)) for some k>=1, else 0, with A(k):=A000201(k) and B(k):=A001950(k), k>=1.
a(n)=1-(1-h(n))-(1-h(n+1)) = h(n)-(1-h(n+1))= h(n)*h(n+1) with h(n):=A005614(n-1), n>=1, the rabbit sequence.
a(n)= A(n+2)-A(n)-3. - Wolfdieter Lang, Jun 27 2011.
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CROSSREFS
| Cf. A003623, A000201, A001950, A188009.
Cf. A003849,A014417. [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Jun 30 2009]
Sequence in context: A025125 A147873 A103589 * A129272 A059648 A079261
Adjacent sequences: A123737 A123738 A123739 * A123741 A123742 A123743
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KEYWORD
| nonn,easy
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Oct 13 2006
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