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A344210
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a(n) = Sum_{d|n} mu(n/d) * d^n / phi(n).
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1
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1, 3, 13, 120, 781, 22932, 137257, 4177920, 64566801, 2497558338, 28531167061, 2228476723200, 25239592216021, 1851888100411464, 54736732481116543, 2305807824841605120, 51702516367896047761, 6557709646516945221396, 109912203092239643840221
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(PARI) a(n) = sumdiv(n, d, moebius(n/d)*d^n)/eulerphi(n);
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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