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A068421
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Numbers n such that sigma(n)=6*(n-phi(n)).
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0
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OFFSET
| 1,1
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COMMENTS
| No other term < 3500000. - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 08 2006
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MAPLE
| with(numtheory): a:=proc(n) if sigma(n)=6*(n-phi(n)) then n else fi end: seq(a(n), n=1..5000); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 08 2006
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CROSSREFS
| Cf. A000010, A000203.
Sequence in context: A013736 A060758 A203339 * A142535 A203475 A203701
Adjacent sequences: A068418 A068419 A068420 * A068422 A068423 A068424
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KEYWORD
| more,nonn,bref
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 02 2002
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