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A064447
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a(n) = EulerPhi(n^n).
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5
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1, 2, 18, 128, 2500, 15552, 705894, 8388608, 258280326, 4000000000, 259374246010, 2972033482752, 279577021469772, 4762288639524864, 233543408203125000, 9223372036854775808, 778579070010669895696, 13115469358432179191808, 1874292305362402347591138
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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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EXAMPLE
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For p prime, a(p) = (p^(p-1))*(p-1) = ((phi(p)+1)^phi(p))*phi(p).
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MATHEMATICA
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PROG
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(PARI) { for (n=1, 100, write("b064447.txt", n, " ", eulerphi(n^n)) ) } \\ Harry J. Smith, Sep 14 2009
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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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