OFFSET
1,2
COMMENTS
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MAPLE
select(t -> (t mod numtheory:-phi(t) = 0) or (t mod numtheory:-tau(t) = 0), [$1..1000]); # Robert Israel, Jul 15 2014
MATHEMATICA
Select[Range[500], AnyTrue[{#/EulerPhi[#], #/DivisorSigma[0, #]}, IntegerQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 12 2020 *)
PROG
(PARI) isok(n) = !((n % eulerphi(n)) && (n % numdiv(n))); \\ Michel Marcus, Jul 15 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Muehlfeld, Jul 13 2014
STATUS
approved