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A011764
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3^(2^n) (or: write in base 3, read in base 9).
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16
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OFFSET
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0,1
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COMMENTS
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a(n) is the second-highest value k such that A173419(k) = n+2. - Charles R Greathouse IV, Oct 03 2012
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..11
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FORMULA
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a(0)=3 and a(n+1)=a(n)^2 [From Benoit Jubin, Jun 27 2009]
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MATHEMATICA
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3^(2^Range[0, 10]) (* Harvey P. Dale, Oct 14 2012 *)
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PROG
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(MAGMA) [3^(2^n): n in [0..8]]; // Vincenzo Librandi, Sep 15 2011
(PARI) a(n)=3^2^n \\ Charles R Greathouse IV, Oct 03 2012
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CROSSREFS
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Sequence in context: A216206 A038062 A218149 * A018624 A032078 A203559
Adjacent sequences: A011761 A011762 A011763 * A011765 A011766 A011767
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KEYWORD
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nonn,easy
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AUTHOR
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Stephan Y Solomon (ilans(AT)way.com)
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STATUS
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approved
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