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A238228
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Numbers n such that if x=sigma(n)+phi(n)-tau(n)-n then n=sigma(x)+phi(x)-tau(x)-x.
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2
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Fixed points: 27,...
sigma(12) = 28, phi(12) = 4, tau(12) = 6 and 28 + 4 - 6 - 12 = 14.
sigma(14) = 24, phi(14) = 6, tau(14) = 4 and 24 + 6 - 4 - 14 = 12.
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MAPLE
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with(numtheory); P:=proc(q)local a, n;
for n from 1 to q do a:=sigma(n)+phi(n)-tau(n)-n;
if sigma(a)+phi(a)-tau(a)-a=n then print(n);
fi; od; end: P(10^6);
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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