1,1

Also n such that sigma(n)>tau(n)*phi(n). - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 06 2002

Solutions to A000203[x]>A000010[x]^2

x={2, 4, 6, 10, 12, 18, 30} sigma[x]={3, 7, 12, 18, 28, 39, 72} phi[x]={1, 2, 2, 4, 4, 6, 8} phi[x]^2={1, 4, 4, 16, 16, 36, 64} sigma[x]-phi[x]^2={2, 3, 8, 2, 12, 3, 8} No more solutions below 10000000.

A000203, A000010, A055234.

Sequence in context: A065385 A055235 A083887 this_sequence A000885 A068336 A133871

Adjacent sequences: A064371 A064372 A064373 this_sequence A064375 A064376 A064377

nonn,fini,full

Labos E. (labos(AT)ana.sote.hu), Sep 27 2001

There are no further terms. - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 06 2002