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Search: id:A165624
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| 3, 1, 27, 387420489, 834385168331080533771857328695283, 60763960966477069091681387708388361355303280176484348309962019712017763508902413\ 22455818405320466786549738961
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OFFSET
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0,1
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FORMULA
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a(n) = 3^A107583(n). [R. J. Mathar, Oct 07 2009]
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EXAMPLE
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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
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lst={}; Do[i=3^n/n^3; If[IntegerQ[i], AppendTo[lst, n]], {n, 6!}]; lst
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CROSSREFS
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Cf. A007758, A165623
Sequence in context: A113099 A027495 A138545 this_sequence A120066 A046979 A141411
Adjacent sequences: A165621 A165622 A165623 this_sequence A165625 A165626 A165627
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 22 2009
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EXTENSIONS
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Definition simplified by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 07 2009
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