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A165623
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Integers of the form a(n)=2^n/n^2.
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1
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OFFSET
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1,1
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LINKS
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EXAMPLE
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2^8/8^2=4, .. n :: 1,2,4,8,16,32,64,128,256,512,..
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MATHEMATICA
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lst={}; Do[i=2^n/n^2; If[IntegerQ[i], AppendTo[lst, i]], {n, 6!}]; lst
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PROG
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(PARI) a(n)=2^(2^(n-1))/(2^(2*n-2))
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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