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A165624
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3^(3^n)/(3^n)^3.
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0
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3, 1, 27, 387420489, 834385168331080533771857328695283, 6076396096647706909168138770838836135530328017648434830996201971201776350890241322455818405320466786549738961
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| a(n) = 3^A107583(n). [R. J. Mathar, Oct 07 2009]
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EXAMPLE
| a(n=0) = 3^1/1^3 =3. a(n=1)=3^3/3^3=1. a(n=2)=3^9/9^3 = 27.
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MATHEMATICA
| lst={}; Do[i=3^n/n^3; If[IntegerQ[i], AppendTo[lst, n]], {n, 6!}]; lst
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CROSSREFS
| Cf. A007758, A165623
Sequence in context: A113099 A027495 A138545 * A188110 A120066 A046979
Adjacent sequences: A165621 A165622 A165623 * A165625 A165626 A165627
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KEYWORD
| nonn
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AUTHOR
| Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 22 2009
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EXTENSIONS
| Definition simplified by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 07 2009
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