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A122645
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a(n) = phi(n)_phi(n) where phi() = A000010.
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1
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1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 10, 4, 14, 6, 8, 8, 22, 6, 26, 8, 14, 10, 46, 8, 40, 14, 26, 14, 64, 8, 90, 22, 40, 22, 52, 14, 114, 26, 52, 22, 160, 14, 170, 40, 52, 46, 190, 22, 170, 40, 98, 52, 262, 26, 160, 52, 114, 64, 298, 22, 360, 90, 114, 98, 200, 40, 402, 98, 180, 52, 490
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listen;
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internal format)
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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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FORMULA
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MAPLE
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a:= n-> (b-> (l-> add(l[i]*b^(i-1), i=1..nops(l)))(
convert(b, base, 10)))(numtheory[phi](n)):
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PROG
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(PARI)
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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