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A078769
n.phi(n)^2<sigma(n)^2.
0
2, 3, 4, 6, 8, 10, 12, 14, 18, 20, 24, 30, 36, 42, 48, 60, 84, 90, 120
OFFSET
0,1
EXAMPLE
8*phi(8)^2=128, sigma(8)^2=225
PROG
(PARI) for (n=1, 1000, if (eulerphi(n)^2*n<sigma(n)^2, print1(n", ")))
CROSSREFS
Cf. A064375.
Sequence in context: A126794 A011862 A122957 * A064375 A037229 A351740
KEYWORD
nonn
AUTHOR
Jon Perry, Jan 09 2003
STATUS
approved