0,1

8*phi(8)^2=128, sigma(8)^2=225

(PARI) for (n=1, 1000, if (eulerphi(n)^2*n<sigma(n)^2, print1(n", ")))

Cf. A064375.

Sequence in context: A126794 A011862 A122957 this_sequence A064375 A037229 A007183

Adjacent sequences: A078766 A078767 A078768 this_sequence A078770 A078771 A078772

nonn

Jon Perry (perry(AT)globalnet.co.uk), Jan 09 2003