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A137893
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Fixed point of the morphism 0->100, 1->101, starting from a(1) = 1.
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6
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1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0
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OFFSET
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1,1
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COMMENTS
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Similar to A080846, but with the 1's and 0's interchanged.
A generalized choral sequence c(3n+r_0)=0, c(3n+r_1)=1, c(3n+r_c)=c(n), with r_0=1, r_1=0, and r_c=2. [From Joel Reyes Noche (joel.noche(AT)up.edu.ph), Jul 09 2009]
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REFERENCES
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J. R. Noche, Generalized Choral Sequences, Matimyas Matematika, 31(2008), 25-28. [From Joel Reyes Noche (joel.noche(AT)up.edu.ph), Jul 09 2009]
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LINKS
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MATHEMATICA
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Flatten[Nest[#/.{0->{1, 0, 0}, 1->{1, 0, 1}}&, 1, 5]] (* Harvey P. Dale, Jul 29 2015 *)
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PROG
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(PARI) a(n) = my(r); until(r, [n, r]=divrem(n, 3)); 2-r; \\ Kevin Ryde, Nov 09 2021
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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Joel Reyes Noche (joel.noche(AT)up.edu.ph), Apr 30 2008
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STATUS
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approved
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