%I
%S 2,4,6,10,12,18,30
%N Numbers k such that sigma(k) > phi(k)^2.
%C Also numbers k such that sigma(k) > tau(k)*phi(k).  _Benoit Cloitre_, Aug 06 2002
%C There are no further terms.  _Benoit Cloitre_, Aug 06 2002
%F Solutions to A000203(k) > A000010(k)^2.
%e k = {2, 4, 6, 10, 12, 18, 30};
%e sigma(k) = {3, 7, 12, 18, 28, 39, 72};
%e phi(k) = {1, 2, 2, 4, 4, 6, 8};
%e phi(k)^2 = {1, 4, 4, 16, 16, 36, 64};
%e sigma(k)  phi(k)^2 = {2, 3, 8, 2, 12, 3, 8}.
%e No more solutions below 10000000.
%Y Cf. A000010, A000203, A055234.
%K nonn,fini,full
%O 1,1
%A _Labos Elemer_, Sep 27 2001
