OFFSET
1,2
MATHEMATICA
Select[Range[3000000], DivisorSigma[1, EulerPhi[#^3]]==EulerPhi[ DivisorSigma[1, #^3]]&] (* Harvey P. Dale, Mar 23 2012 *)
PROG
(PARI) for(n=1, 10^9, if(sigma(eulerphi(n^3))==eulerphi(sigma(n^3)), print(n)))
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jason Earls, Aug 20 2001
EXTENSIONS
a(11) from Amiram Eldar, Dec 08 2023
STATUS
approved