A068577 Numbers n such that tau(n)^2 > phi(n).

2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 30, 32, 36, 40, 42, 44, 45, 48, 50, 52, 54, 56, 60, 64, 66, 68, 70, 72, 78, 80, 84, 88, 90, 96, 100, 102, 104, 105, 108, 110, 112, 114, 120, 126, 130, 132, 138, 140, 144, 150, 154, 156, 160, 162, 168

Offset

1,1

Links

Ivan Neretin, Table of n, a(n) for n = 1..396 (full sequence)

Mathematica

Select[Range[170], DivisorSigma[0, #]^2 > EulerPhi[#] &] (* Ivan Neretin, Oct 16 2016 *)

Crossrefs

Sequence in context: A094229 A067290 A106577 * A225731 A246352 A363227

Adjacent sequences: A068574 A068575 A068576 * A068578 A068579 A068580

Keyword

easy,nonn,fini,full

Author

Benoit Cloitre, Mar 26 2002

Status

approved