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A068578 tau(n)*sigma(n)>n*phi(n). 0
2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30, 36, 40, 42, 48, 60, 72, 84, 90, 120, 180 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

CROSSREFS

Sequence in context: A055721 A064376 A283808 * A203812 A047894 A113769

Adjacent sequences:  A068575 A068576 A068577 * A068579 A068580 A068581

KEYWORD

easy,fini,full,nonn

AUTHOR

Benoit Cloitre, Mar 26 2002

STATUS

approved

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Last modified September 18 05:32 EDT 2019. Contains 327165 sequences. (Running on oeis4.)