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A165421
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a(1) = 1, a(2) = 3, a(n) = product of the previous terms for n >= 3.
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5
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OFFSET
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1,2
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COMMENTS
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Essentially a duplicate of A011764. - N. J. A. Sloane, Oct 06 2009
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..14
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FORMULA
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a(1) = 1, a(2) = 3, a(n) = product_{i=1..n-1} a(i), n >= 3. a(1) = 1, a(2) = 3, a(n) = A000244(2^(n-3)) = A011764(n-3) = 3^(2^(n-3)), n >= 3. a(1) = 1, a(2) = 3, a(3) = 3, a(n) = (a(n-1))^2, n >= 4.
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CROSSREFS
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Sequence in context: A257627 A115564 A122961 * A227432 A100731 A072004
Adjacent sequences: A165418 A165419 A165420 * A165422 A165423 A165424
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KEYWORD
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nonn
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AUTHOR
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Jaroslav Krizek, Sep 17 2009
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STATUS
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approved
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