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1, 1, 2, 2, 6, 2, 4, 6, 4, 6, 6, 6, 12, 4, 8, 8, 30, 4, 24, 8, 12, 6, 12, 8, 12, 12, 24, 12, 24, 8, 24, 30, 12, 30, 16, 12, 72, 24, 16, 30, 24, 12, 32, 12, 16, 12, 24, 30, 32, 12, 36, 16, 42, 24, 24, 16, 72, 24, 24, 30, 48, 24, 72, 36, 60, 12, 48, 36, 24, 16
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OFFSET
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1,3
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COMMENTS
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LINKS
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MAPLE
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MATHEMATICA
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EulerPhi[DivisorSigma[1, EulerPhi[Range[80]]]] (* Harvey P. Dale, Dec 24 2012 *)
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PROG
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(PARI) vector(50, n, eulerphi(sigma(eulerphi(n)))) \\ G. C. Greubel, Dec 19 2016
(Magma) [EulerPhi(SumOfDivisors(EulerPhi(n))): n in [1..80]]; // Vincenzo Librandi, Dec 21 2016
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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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