OFFSET
1,2
COMMENTS
sigma_6(n) is the sum of the 6th powers of the divisors of n (A013954).
MATHEMATICA
Do[If[Mod[DivisorSigma[6, n]+EulerPhi[n]^6, n]==0, Print[n]], {n, 1, 10^5}]
PROG
(PARI) isok(n) = !((sigma(n, 6) + eulerphi(n)^6) % n); \\ Michel Marcus, Mar 02 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jun 09 2000
EXTENSIONS
More terms from Michel Marcus, Mar 02 2014
STATUS
approved