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Search: id:A014710
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| A014710 |
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The regular paper-folding (or dragon curve) sequence. |
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2
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| 2, 2, 1, 2, 2, 1, 1, 2, 2, 2, 1, 1, 2, 1, 1, 2, 2, 2, 1, 2, 2, 1, 1, 1, 2, 2, 1, 1, 2, 1, 1
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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G. Melancon, Factorizing infinite words using Maple, MapleTech journal, vol. 4, no. 1, 1997, pp. 34-42, esp. p. 36.
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LINKS
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Index entries for sequences obtained by enumerating foldings
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FORMULA
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Set a=2, b=1, S(0)=a, S(n+1) = S(n)aF(S(n)), where F(x) reverses x and then interchanges a and b; sequence is limit S(infinity).
a(4n) = 2, a(4n+2) = 1, a(2n+1) = a(n).
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CROSSREFS
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See A014577 for more references and more terms.
Adjacent sequences: A014707 A014708 A014709 this_sequence A014711 A014712 A014713
Sequence in context: A059689 A131837 A087889 this_sequence A055174 A096369 A102297
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KEYWORD
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nonn
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AUTHOR
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njas
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