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A173501
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a(1) = 2, a(2) = 3, a(n) = 6^(2^(n-3)) for n >= 3.
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5
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OFFSET
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1,1
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COMMENTS
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Except for first three terms, a(n) = (a(n-1))^2.
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LINKS
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FORMULA
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a(n) = Product_{i=1..n-1} a(i) with a(1) = 2 and a(2) = 3.
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MATHEMATICA
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Table[If[n<3, n+1, 6^(2^(n-3))], {n, 10}] (* G. C. Greubel, Apr 25 2021 *)
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PROG
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(SageMath) [2, 3]+[6^(2^(n-3)) for n in (3..10)] # G. C. Greubel, Apr 25 2021
(PARI) a(n) = if(n<=2, n+1, 6^(2^(n-3))) \\ Felix Fröhlich, Apr 25 2021
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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